Yeah Chris (saw your name!), Brian Ding of Rythmik designed and builds the plate amp (some of the electronics are sent to him from China, of course), and worked with Danny of GR Research in the design of the two OB woofers (8" & 12"). They also worked together in the development of the shelving circuit (6dB/octave boost below a certain frequency, to counteract the front-to-back cancellation inherent in all dipole speakers and subs) installed in the amp when it is used for driving the OB woofers. But Rythmik (Brian and Enrico) doesn't actively promote the OB/Dipole sub, Danny Richie of GR Research does. Any questions you have about the sub are better asked of him---it is his "baby". And it is his customers who buy, use, and discuss the OB/Dipole sub, not Rythmik customers. It's an unusual relationship and arrangement Brian and Danny have, but has worked out great. Both happen to be located in Texas, which may be one reason they got together.

I don't know how you feel about this idea Chris, but the width of a W- or H-frame is around 16". The OB/Dipole sub can actually be used horizontally (laid on it's side), and a Quad speaker set on top of it, the sub thus becoming a 16" high stand for the speaker. Since there is a null on each side of the frame, there is no sonic penalty for doing so, except for any vibration transferred from the sub frame to the Quad. A set of Townshend Audio Seismic Pods between sub and speaker will take care of that. The Gradient OB/Dipole sub for the Quad 63 speaker was used that exact way, Gradient even styling the sub to look like it came from the Quad factory, it's size and shape matched to that of the 63. A simple phase-coherent 6dB/octave crossover (just a capacitor and resistor across the input jacks of the amp powering the Quads) can then be used, as the woofers and ESL panels will be closely aligned.

Richard Vandersteen's sub itself uses a 1st order crossover, and has been very successfully used with Quads and other planars. Brooks Berdan was a big fan of them when he was a Vandersteen dealer (one of the biggest in the country), and I heard them at his shop many times. I could live with a pair, and they would definitely be worth a try, especially if you don't want to have to go to the trouble of building or having built for you the frames for GR subs.

The Gradient OB/Dipole sub for the Quad 63 was reviewed in TAS in the early 90's, I believe it was. You can read the review at regonaudio.com, in which the advantages and benefits of it's use with the 63's is discussed. And there is a lot to read about the GR Research sub on Danny's AudioCircle Forum. Definitely worth looking into, for what I feel turns any good planar speaker into a way over-achieving (for the investment) full-range (ten octave!) loudspeaker. An OB/Dipole sub really is the ultimate solution to the missing bottom octave of response and limited maximum SPL output capabilities of most planar loudspeakers, non more so than the Quad 57.

bdp24 November 06, 2015 00:21

Yeah Chris (saw your name!), Brian Ding of Rythmik designed and builds the plate amp (some of the electronics are sent to him from China, of course), and worked with Danny of GR Research in the design of the two OB woofers (8" & 12"). They also worked together in the development of the shelving circuit (6dB/octave boost below a certain frequency, to counteract the front-to-back cancellation inherent in all dipole speakers and subs) installed in the amp when it is used for driving the OB woofers. But Rythmik (Brian and Enrico) doesn't actively promote the OB/Dipole sub, Danny Richie of GR Research does. Any questions you have about the sub are better asked of him---it is his "baby". And it is his customers who buy, use, and discuss the OB/Dipole sub, not Rythmik customers. It's an unusual relationship and arrangement Brian and Danny have, but has worked out great. Both happen to be located in Texas, which may be one reason they got together.

I don't know how you feel about this idea Chris, but the width of a W- or H-frame is around 16". The OB/Dipole sub can actually be used horizontally (laid on it's side), and a Quad speaker set on top of it, the sub thus becoming a 16" high stand for the speaker. Since there is a null on each side of the frame, there is no sonic penalty for doing so, except for any vibration transferred from the sub frame to the Quad. A set of Townshend Audio Seismic Pods between sub and speaker will take care of that. The Gradient OB/Dipole sub for the Quad 63 speaker was used that exact way, Gradient even styling the sub to look like it came from the Quad factory, it's size and shape matched to that of the 63. A simple phase-coherent 6dB/octave crossover (just a capacitor and resistor across the input jacks of the amp powering the Quads) can then be used, as the woofers and ESL panels will be closely aligned.

Richard Vandersteen's sub itself uses a 1st order crossover, and has been very successfully used with Quads and other planars. Brooks Berdan was a big fan of them when he was a Vandersteen dealer (one of the biggest in the country), and I heard them at his shop many times. I could live with a pair, and they would definitely be worth a try, especially if you don't want to have to go to the trouble of building or having built for you the frames for GR subs.

The Gradient OB/Dipole sub for the Quad 63 was reviewed in TAS in the early 90's, I believe it was. You can read the review at regonaudio.com, in which the advantages and benefits of it's use with the 63's is discussed. And there is a lot to read about the GR Research sub on Danny's AudioCircle Forum. Definitely worth looking into, for what I feel turns any good planar speaker into a way over-achieving (for the investment) full-range (ten octave!) loudspeaker. An OB/Dipole sub really is the ultimate solution to the missing bottom octave of response and limited maximum SPL output capabilities of most planar loudspeakers, non more so than the Quad 57.

bdp24 November 06, 2015 00:21

Yeah Chris (saw your name!), Brian Ding of Rythmik designed and builds the plate amp (some of the electronics are sent to him from China, of course), and worked with Danny of GR Research in the design of the two OB woofers (8" & 12"). They also worked together in the development of the shelving circuit (6dB/octave boost below a certain frequency, to counteract the front-to-back cancellation inherent in all dipole speakers and subs) installed in the amp when it is used for driving the OB woofers. But Rythmik (Brian and Enrico) doesn't actively promote the OB/Dipole sub, Danny Richie of GR Research does. Any questions you have about the sub are better asked of him---it is his "baby". And it is his customers who buy, use, and discuss the OB/Dipole sub, not Rythmik customers. It's an unusual relationship and arrangement Brian and Danny have, but has worked out great. Both happen to be located in Texas, which may be one reason they got together.

I don't know how you feel about this idea Chris, but the width of a W- or H-frame is around 16". The OB/Dipole sub can actually be used horizontally (laid on it's side), and a Quad speaker set on top of it, the sub thus becoming a 16" high stand for the speaker. Since there is a null on each side of the frame, there is no sonic penalty for doing so, except for any vibration transferred from the sub frame to the Quad. A set of Townshend Audio Seismic Pods between sub and speaker will take care of that. The Gradient OB/Dipole sub for the Quad 63 speaker was used that exact way, Gradient even styling the sub to look like it came from the Quad factory, it's size and shape matched to that of the 63. A simple phase-coherent 6dB/octave crossover (just a capacitor and resistor across the input jacks of the amp powering the Quads) can then be used, as the woofers and ESL panels will be closely aligned.

Richard Vandersteen's sub itself uses a 1st order crossover, and has been very successfully used with Quads and other planars. Brooks Berdan was a big fan of them when he was a Vandersteen dealer (one of the biggest in the country), and I heard them at his shop many times. I could live with a pair, and they would definitely be worth a try, especially if you don't want to have to go to the trouble of building or having built for you the frames for GR subs.

The Gradient OB/Dipole sub for the Quad 63 was reviewed in TAS in the early 90's, I believe it was. You can read the review at regonaudio.com, in which the advantages and benefits of it's use with the 63's is discussed. And there is a lot to read about the GR Research sub on Danny's AudioCircle Forum. Definitely worth looking into, for what I feel turns any good planar speaker into a way over-achieving (for the investment) full-range (ten octave!) loudspeaker. An OB/Dipole sub really is the ultimate solution to the missing bottom octave of response and limited maximum SPL output capabilities of most planar loudspeakers, non more so than the Quad 57.

bdp24 November 06, 2015 00:21

Yeah Chris (saw your name!), Brian Ding of Rythmik designed and builds the plate amp (some of the electronics are sent to him from China, of course), and worked with Danny of GR Research in the design of the two OB woofers (8" & 12"). They also worked together in the development of the shelving circuit (6dB/octave boost below a certain frequency, to counteract the front-to-back cancellation inherent in all dipole speakers and subs) installed in the amp when it is used for driving the OB woofers. But Rythmik (Brian and Enrico) doesn't actively promote the OB/Dipole sub, Danny Richie of GR Research does. Any questions you have about the sub are better asked of him---it is his "baby". And it is his customers who buy, use, and discuss the OB/Dipole sub, not Rythmik customers. It's an unusual relationship and arrangement Brian and Danny have, but has worked out great. Both happen to be located in Texas, which may be one reason they got together.

I don't know how you feel about this idea Chris, but the width of a W- or H-frame is around 16". The OB/Dipole sub can actually be used horizontally (laid on it's side), and a Quad speaker set on top of it, the sub thus becoming a 16" high stand for the speaker. Since there is a null on each side of the frame, there is no sonic penalty for doing so, except for any vibration transferred from the sub frame to the Quad. A set of Townshend Audio Seismic Pods between sub and speaker will take care of that. The Gradient OB/Dipole sub for the Quad 63 speaker was used that exact way, Gradient even styling the sub to look like it came from the Quad factory, it's size and shape matched to that of the 63. A simple phase-coherent 6dB/octave crossover (just a capacitor and resistor across the input jacks of the amp powering the Quads) can then be used, as the woofers and ESL panels will be closely aligned.

Richard Vandersteen's sub itself uses a 1st order crossover, and has been very successfully used with Quads and other planars. Brooks Berdan was a big fan of them when he was a Vandersteen dealer (one of the biggest in the country), and I heard them at his shop many times. I could live with a pair, and they would definitely be worth a try, especially if you don't want to have to go to the trouble of building or having built for you the frames for GR subs.

The Gradient OB/Dipole sub for the Quad 63 was reviewed in TAS in the early 90's, I believe it was. You can read the review at regonaudio.com, in which the advantages and benefits of it's use with the 63's is discussed. And there is a lot to read about the GR Research sub on Danny's AudioCircle Forum. Definitely worth looking into, for what I feel turns any good planar speaker into a way over-achieving (for the investment) full-range (ten octave!) loudspeaker. An OB/Dipole sub really is the ultimate solution to the missing bottom octave of response and limited maximum SPL output capabilities of most planar loudspeakers, non more so than the Quad 57.

bdp24 November 06, 2015 00:21

Yeah Chris (saw your name!), Brian Ding of Rythmik designed and builds the plate amp (some of the electronics are sent to him from China, of course), and worked with Danny of GR Research in the design of the two OB woofers (8" & 12"). They also worked together in the development of the shelving circuit (6dB/octave boost below a certain frequency, to counteract the front-to-back cancellation inherent in all dipole speakers and subs) installed in the amp when it is used for driving the OB woofers. But Rythmik (Brian and Enrico) doesn't actively promote the OB/Dipole sub, Danny Richie of GR Research does. Any questions you have about the sub are better asked of him---it is his "baby". And it is his customers who buy, use, and discuss the OB/Dipole sub, not Rythmik customers. It's an unusual relationship and arrangement Brian and Danny have, but has worked out great. Both happen to be located in Texas, which may be one reason they got together.

I don't know how you feel about this idea Chris, but the width of a W- or H-frame is around 16". The OB/Dipole sub can actually be used horizontally (laid on it's side), and a Quad speaker set on top of it, the sub thus becoming a 16" high stand for the speaker. Since there is a null on each side of the frame, there is no sonic penalty for doing so, except for any vibration transferred from the sub frame to the Quad. A set of Townshend Audio Seismic Pods between sub and speaker will take care of that. The Gradient OB/Dipole sub for the Quad 63 speaker was used that exact way, Gradient even styling the sub to look like it came from the Quad factory, it's size and shape matched to that of the 63. A simple phase-coherent 6dB/octave crossover (just a capacitor and resistor across the input jacks of the amp powering the Quads) can then be used, as the woofers and ESL panels will be closely aligned.

Richard Vandersteen's sub itself uses a 1st order crossover, and has been very successfully used with Quads and other planars. Brooks Berdan was a big fan of them when he was a Vandersteen dealer (one of the biggest in the country), and I heard them at his shop many times. I could live with a pair, and they would definitely be worth a try, especially if you don't want to have to go to the trouble of building or having built for you the frames for GR subs.

The Gradient OB/Dipole sub for the Quad 63 was reviewed in TAS in the early 90's, I believe it was. You can read the review at regonaudio.com, in which the advantages and benefits of it's use with the 63's is discussed. And there is a lot to read about the GR Research sub on Danny's AudioCircle Forum. Definitely worth looking into, for what I feel turns any good planar speaker into a way over-achieving (for the investment) full-range (ten octave!) loudspeaker. An OB/Dipole sub really is the ultimate solution to the missing bottom octave of response and limited maximum SPL output capabilities of most planar loudspeakers, non more so than the Quad 57.

bdp24 November 06, 2015 00:21

Yeah Chris (saw your name!), Brian Ding of Rythmik designed and builds the plate amp (some of the electronics are sent to him from China, of course), and worked with Danny of GR Research in the design of the two OB woofers (8" & 12"). They also worked together in the development of the shelving circuit (6dB/octave boost below a certain frequency, to counteract the front-to-back cancellation inherent in all dipole speakers and subs) installed in the amp when it is used for driving the OB woofers. But Rythmik (Brian and Enrico) doesn't actively promote the OB/Dipole sub, Danny Richie of GR Research does. Any questions you have about the sub are better asked of him---it is his "baby". And it is his customers who buy, use, and discuss the OB/Dipole sub, not Rythmik customers. It's an unusual relationship and arrangement Brian and Danny have, but has worked out great. Both happen to be located in Texas, which may be one reason they got together.

I don't know how you feel about this idea Chris, but the width of a W- or H-frame is around 16". The OB/Dipole sub can actually be used horizontally (laid on it's side), and a Quad speaker set on top of it, the sub thus becoming a 16" high stand for the speaker. Since there is a null on each side of the frame, there is no sonic penalty for doing so, except for any vibration transferred from the sub frame to the Quad. A set of Townshend Audio Seismic Pods between sub and speaker will take care of that. The Gradient OB/Dipole sub for the Quad 63 speaker was used that exact way, Gradient even styling the sub to look like it came from the Quad factory, it's size and shape matched to that of the 63. A simple phase-coherent 6dB/octave crossover (just a capacitor and resistor across the input jacks of the amp powering the Quads) can then be used, as the woofers and ESL panels will be closely aligned.

Richard Vandersteen's sub itself uses a 1st order crossover, and has been very successfully used with Quads and other planars. Brooks Berdan was a big fan of them when he was a Vandersteen dealer (one of the biggest in the country), and I heard them at his shop many times. I could live with a pair, and they would definitely be worth a try, especially if you don't want to have to go to the trouble of building or having built for you the frames for GR subs.

The Gradient OB/Dipole sub for the Quad 63 was reviewed in TAS in the early 90's, I believe it was. You can read the review at regonaudio.com, in which the advantages and benefits of it's use with the 63's is discussed. And there is a lot to read about the GR Research sub on Danny's AudioCircle Forum. Definitely worth looking into, for what I feel turns any good planar speaker into a way over-achieving (for the investment) full-range (ten octave!) loudspeaker. An OB/Dipole sub really is the ultimate solution to the missing bottom octave of response and limited maximum SPL output capabilities of most planar loudspeakers, non more so than the Quad 57.

bdp24 November 06, 2015 00:21

Yeah Chris (saw your name!), Brian Ding of Rythmik designed and builds the plate amp (some of the electronics are sent to him from China, of course), and worked with Danny of GR Research in the design of the two OB woofers (8" & 12"). They also worked together in the development of the shelving circuit (6dB/octave boost below a certain frequency, to counteract the front-to-back cancellation inherent in all dipole speakers and subs) installed in the amp when it is used for driving the OB woofers. But Rythmik (Brian and Enrico) doesn't actively promote the OB/Dipole sub, Danny Richie of GR Research does. Any questions you have about the sub are better asked of him---it is his "baby". And it is his customers who buy, use, and discuss the OB/Dipole sub, not Rythmik customers. It's an unusual relationship and arrangement Brian and Danny have, but has worked out great. Both happen to be located in Texas, which may be one reason they got together.

I don't know how you feel about this idea Chris, but the width of a W- or H-frame is around 16". The OB/Dipole sub can actually be used horizontally (laid on it's side), and a Quad speaker set on top of it, the sub thus becoming a 16" high stand for the speaker. Since there is a null on each side of the frame, there is no sonic penalty for doing so, except for any vibration transferred from the sub frame to the Quad. A set of Townshend Audio Seismic Pods between sub and speaker will take care of that. The Gradient OB/Dipole sub for the Quad 63 speaker was used that exact way, Gradient even styling the sub to look like it came from the Quad factory, it's size and shape matched to that of the 63. A simple phase-coherent 6dB/octave crossover (just a capacitor and resistor across the input jacks of the amp powering the Quads) can then be used, as the woofers and ESL panels will be closely aligned.

Richard Vandersteen's sub itself uses a 1st order crossover, and has been very successfully used with Quads and other planars. Brooks Berdan was a big fan of them when he was a Vandersteen dealer (one of the biggest in the country), and I heard them at his shop many times. I could live with a pair, and they would definitely be worth a try, especially if you don't want to have to go to the trouble of building or having built for you the frames for GR subs.

The Gradient OB/Dipole sub for the Quad 63 was reviewed in TAS in the early 90's, I believe it was. You can read the review at regonaudio.com, in which the advantages and benefits of it's use with the 63's is discussed. And there is a lot to read about the GR Research sub on Danny's AudioCircle Forum. Definitely worth looking into, for what I feel turns any good planar speaker into a way over-achieving (for the investment) full-range (ten octave!) loudspeaker. An OB/Dipole sub really is the ultimate solution to the missing bottom octave of response and limited maximum SPL output capabilities of most planar loudspeakers, non more so than the Quad 57.

bdp24 November 06, 2015 00:21

Chris,
Why don't you contact Richard Vandersteen about the suitability of the 2Wq for the Quads or John at Audio Connection who is an expert.

halcro November 05, 2015 20:37

Bdp24 - The OB/Dipole sub is a completely different animal than any sealed or ported sub.
Bdp

Yes Indeed, I was surprised with Quad 57 in the subject line that he didn't hit on the OB sub in the emails and instead discussed the other subs. And I did not discuss DIY or finished. No problem. I wanted to hear him out and his responses to my emails were really fast.

Since you can't hear the Gr Research/Rythmik OB/Dipole Sub before purchase, I highly recommend reading all about it on the GR AudioCircle Forum
Yes will do more reading on it. I'd like to learn more about it.

GR Audiocircle OB Sub

Once this November T Shirt and Flip Flop weather goes away for good.

Thanks for making me aware of this product. Also Considering DIY..

Bdp24 - As to locating subs nearfield to reduce possible distortion, consider this: The limiting factor in a hybrid loudspeaker/sub pairing will be the maximum output of your loudspeakers, not the sub. When your Quads have reached their maximum SPL, the subs will still be coasting!
Bdp - your point is noted in general; but each case /room is unique. So lets acknowledge something here because it plays a big role in my space/room. The importance of the proper mating of a speakers system and amp/s. In this case the Music Reference RM10 and Quad 57's are joined at the hip - by design. (Thank u Mr. Modjeski).
In my space; with the 57's positioning and the nearfield sub, I am not reaching the 57's maximum SPL (yet) in that fairly large room with my listening habits. I am also only looking to fill in the bottom - without encroaching on the 57's output. Zero. The Matrix 800's in room A are the bass reference. I can hear what if anything I am missing in Room B. Both from an actual note and pressure (visceral) sense.

Btw your references to my ET Speakers. These are listed in my Notables Section of my virtual system page. Meaning good memories. Unfortunately no longer own them. :^(
They fell victim to the " I Just can't find a place to hide them from my wife scenario "

Audiophile Memory - Chilly Winter Day.
There they were, the ET LFT8a's and Modded Acoustats Model 3 upstairs not bothering anyone in a living room we don't use much anymore. I think it all came about after my wife found me in that room listening to the Model 3's with the OTL's . The heat from the amps shut the house thermostat which was in the room down. Rest of the House got cold. She came in and found me looking like I was enjoying the sand in Puerto Vallarta with a drink in hand - just no umbrella in it. Long story short I was forced to cull. So one day I reluctantly lined up the ET Lft8a and Accoustat up on one side like a Police line. It was a no decision. The differences in that room - the Models 3's made music sound like it was in a studio. The ET's sounded more like in a hall. More ambient info. Both good. ET's could be replaced one day so they had to go. In comparison the Quad's 57's sound is live at the Microphone with voices.......
note:
I had the A version's not the B's of the ET's. Thought about getting Bruce to send me the tweeters to make them b's but changed my mind because of the setup. Going by memory - the A version tweeter panels are dipole, don't have the material in the speaker tweeter panel (if I remember right) blocking the back wave. Being a tall narrow speaker the A version allowed you to place them on the sides of the wall (midfield) in a long narrow room. One on each side. You could get imaging at both sides of a long room this way. It was so cool. Miss them.

Bdp - are u familair with the Vandersteen 2wq's subs. Any thoughts in regards to compatibility with the 57's ?

Anyone else used or heard them with 57's ?

ct0517 November 05, 2015 07:10

Bdp24 - The OB/Dipole sub is a completely different animal than any sealed or ported sub.
Bdp

Yes Indeed, I was surprised with Quad 57 in the subject line that he didn't hit on the OB sub in the emails and instead discussed the other subs. And I did not discuss DIY or finished. No problem. I wanted to hear him out and his responses to my emails were really fast.

Since you can't hear the Gr Research/Rythmik OB/Dipole Sub before purchase, I highly recommend reading all about it on the GR AudioCircle Forum
Yes will do more reading on it. I'd like to learn more about it.

GR Audiocircle OB Sub

Once this November T Shirt and Flip Flop weather goes away for good.

Thanks for making me aware of this product. Also Considering DIY..

Bdp24 - As to locating subs nearfield to reduce possible distortion, consider this: The limiting factor in a hybrid loudspeaker/sub pairing will be the maximum output of your loudspeakers, not the sub. When your Quads have reached their maximum SPL, the subs will still be coasting!
Bdp - your point is noted in general; but each case /room is unique. So lets acknowledge something here because it plays a big role in my space/room. The importance of the proper mating of a speakers system and amp/s. In this case the Music Reference RM10 and Quad 57's are joined at the hip - by design. (Thank u Mr. Modjeski).
In my space; with the 57's positioning and the nearfield sub, I am not reaching the 57's maximum SPL (yet) in that fairly large room with my listening habits. I am also only looking to fill in the bottom - without encroaching on the 57's output. Zero. The Matrix 800's in room A are the bass reference. I can hear what if anything I am missing in Room B. Both from an actual note and pressure (visceral) sense.

Btw your references to my ET Speakers. These are listed in my Notables Section of my virtual system page. Meaning good memories. Unfortunately no longer own them. :^(
They fell victim to the " I Just can't find a place to hide them from my wife scenario "

Audiophile Memory - Chilly Winter Day.
There they were, the ET LFT8a's and Modded Acoustats Model 3 upstairs not bothering anyone in a living room we don't use much anymore. I think it all came about after my wife found me in that room listening to the Model 3's with the OTL's . The heat from the amps shut the house thermostat which was in the room down. Rest of the House got cold. She came in and found me looking like I was enjoying the sand in Puerto Vallarta with a drink in hand - just no umbrella in it. Long story short I was forced to cull. So one day I reluctantly lined up the ET Lft8a and Accoustat up on one side like a Police line. It was a no decision. The differences in that room - the Models 3's made music sound like it was in a studio. The ET's sounded more like in a hall. More ambient info. Both good. ET's could be replaced one day so they had to go. In comparison the Quad's 57's sound is live at the Microphone with voices.......
note:
I had the A version's not the B's of the ET's. Thought about getting Bruce to send me the tweeters to make them b's but changed my mind because of the setup. Going by memory - the A version tweeter panels are dipole, don't have the material in the speaker tweeter panel (if I remember right) blocking the back wave. Being a tall narrow speaker the A version allowed you to place them on the sides of the wall (midfield) in a long narrow room. One on each side. You could get imaging at both sides of a long room this way. It was so cool. Miss them.

Bdp - are u familair with the Vandersteen 2wq's subs. Any thoughts in regards to compatibility with the 57's ?

Anyone else used or heard them with 57's ?

ct0517 November 05, 2015 07:10

Bdp24 - The OB/Dipole sub is a completely different animal than any sealed or ported sub.
Bdp

Yes Indeed, I was surprised with Quad 57 in the subject line that he didn't hit on the OB sub in the emails and instead discussed the other subs. And I did not discuss DIY or finished. No problem. I wanted to hear him out and his responses to my emails were really fast.

Since you can't hear the Gr Research/Rythmik OB/Dipole Sub before purchase, I highly recommend reading all about it on the GR AudioCircle Forum
Yes will do more reading on it. I'd like to learn more about it.

GR Audiocircle OB Sub

Once this November T Shirt and Flip Flop weather goes away for good.

Thanks for making me aware of this product. Also Considering DIY..

Bdp24 - As to locating subs nearfield to reduce possible distortion, consider this: The limiting factor in a hybrid loudspeaker/sub pairing will be the maximum output of your loudspeakers, not the sub. When your Quads have reached their maximum SPL, the subs will still be coasting!
Bdp - your point is noted in general; but each case /room is unique. So lets acknowledge something here because it plays a big role in my space/room. The importance of the proper mating of a speakers system and amp/s. In this case the Music Reference RM10 and Quad 57's are joined at the hip - by design. (Thank u Mr. Modjeski).
In my space; with the 57's positioning and the nearfield sub, I am not reaching the 57's maximum SPL (yet) in that fairly large room with my listening habits. I am also only looking to fill in the bottom - without encroaching on the 57's output. Zero. The Matrix 800's in room A are the bass reference. I can hear what if anything I am missing in Room B. Both from an actual note and pressure (visceral) sense.

Btw your references to my ET Speakers. These are listed in my Notables Section of my virtual system page. Meaning good memories. Unfortunately no longer own them. :^(
They fell victim to the " I Just can't find a place to hide them from my wife scenario "

Audiophile Memory - Chilly Winter Day.
There they were, the ET LFT8a's and Modded Acoustats Model 3 upstairs not bothering anyone in a living room we don't use much anymore. I think it all came about after my wife found me in that room listening to the Model 3's with the OTL's . The heat from the amps shut the house thermostat which was in the room down. Rest of the House got cold. She came in and found me looking like I was enjoying the sand in Puerto Vallarta with a drink in hand - just no umbrella in it. Long story short I was forced to cull. So one day I reluctantly lined up the ET Lft8a and Accoustat up on one side like a Police line. It was a no decision. The differences in that room - the Models 3's made music sound like it was in a studio. The ET's sounded more like in a hall. More ambient info. Both good. ET's could be replaced one day so they had to go. In comparison the Quad's 57's sound is live at the Microphone with voices.......
note:
I had the A version's not the B's of the ET's. Thought about getting Bruce to send me the tweeters to make them b's but changed my mind because of the setup. Going by memory - the A version tweeter panels are dipole, don't have the material in the speaker tweeter panel (if I remember right) blocking the back wave. Being a tall narrow speaker the A version allowed you to place them on the sides of the wall (midfield) in a long narrow room. One on each side. You could get imaging at both sides of a long room this way. It was so cool. Miss them.

Bdp - are u familair with the Vandersteen 2wq's subs. Any thoughts in regards to compatibility with the 57's ?

Anyone else used or heard them with 57's ?

ct0517 November 05, 2015 07:10

Bdp24 - The OB/Dipole sub is a completely different animal than any sealed or ported sub.
Bdp

Yes Indeed, I was surprised with Quad 57 in the subject line that he didn't hit on the OB sub in the emails and instead discussed the other subs. And I did not discuss DIY or finished. No problem. I wanted to hear him out and his responses to my emails were really fast.

Since you can't hear the Gr Research/Rythmik OB/Dipole Sub before purchase, I highly recommend reading all about it on the GR AudioCircle Forum
Yes will do more reading on it. I'd like to learn more about it.

GR Audiocircle OB Sub

Once this November T Shirt and Flip Flop weather goes away for good.

Thanks for making me aware of this product. Also Considering DIY..

Bdp24 - As to locating subs nearfield to reduce possible distortion, consider this: The limiting factor in a hybrid loudspeaker/sub pairing will be the maximum output of your loudspeakers, not the sub. When your Quads have reached their maximum SPL, the subs will still be coasting!
Bdp - your point is noted in general; but each case /room is unique. So lets acknowledge something here because it plays a big role in my space/room. The importance of the proper mating of a speakers system and amp/s. In this case the Music Reference RM10 and Quad 57's are joined at the hip - by design. (Thank u Mr. Modjeski).
In my space; with the 57's positioning and the nearfield sub, I am not reaching the 57's maximum SPL (yet) in that fairly large room with my listening habits. I am also only looking to fill in the bottom - without encroaching on the 57's output. Zero. The Matrix 800's in room A are the bass reference. I can hear what if anything I am missing in Room B. Both from an actual note and pressure (visceral) sense.

Btw your references to my ET Speakers. These are listed in my Notables Section of my virtual system page. Meaning good memories. Unfortunately no longer own them. :^(
They fell victim to the " I Just can't find a place to hide them from my wife scenario "

Audiophile Memory - Chilly Winter Day.
There they were, the ET LFT8a's and Modded Acoustats Model 3 upstairs not bothering anyone in a living room we don't use much anymore. I think it all came about after my wife found me in that room listening to the Model 3's with the OTL's . The heat from the amps shut the house thermostat which was in the room down. Rest of the House got cold. She came in and found me looking like I was enjoying the sand in Puerto Vallarta with a drink in hand - just no umbrella in it. Long story short I was forced to cull. So one day I reluctantly lined up the ET Lft8a and Accoustat up on one side like a Police line. It was a no decision. The differences in that room - the Models 3's made music sound like it was in a studio. The ET's sounded more like in a hall. More ambient info. Both good. ET's could be replaced one day so they had to go. In comparison the Quad's 57's sound is live at the Microphone with voices.......
note:
I had the A version's not the B's of the ET's. Thought about getting Bruce to send me the tweeters to make them b's but changed my mind because of the setup. Going by memory - the A version tweeter panels are dipole, don't have the material in the speaker tweeter panel (if I remember right) blocking the back wave. Being a tall narrow speaker the A version allowed you to place them on the sides of the wall (midfield) in a long narrow room. One on each side. You could get imaging at both sides of a long room this way. It was so cool. Miss them.

Bdp - are u familair with the Vandersteen 2wq's subs. Any thoughts in regards to compatibility with the 57's ?

Anyone else used or heard them with 57's ?

ct0517 November 05, 2015 07:10

Bdp24 - The OB/Dipole sub is a completely different animal than any sealed or ported sub.
Bdp

Yes Indeed, I was surprised with Quad 57 in the subject line that he didn't hit on the OB sub in the emails and instead discussed the other subs. And I did not discuss DIY or finished. No problem. I wanted to hear him out and his responses to my emails were really fast.

Since you can't hear the Gr Research/Rythmik OB/Dipole Sub before purchase, I highly recommend reading all about it on the GR AudioCircle Forum
Yes will do more reading on it. I'd like to learn more about it.

GR Audiocircle OB Sub

Once this November T Shirt and Flip Flop weather goes away for good.

Thanks for making me aware of this product. Also Considering DIY..

Bdp24 - As to locating subs nearfield to reduce possible distortion, consider this: The limiting factor in a hybrid loudspeaker/sub pairing will be the maximum output of your loudspeakers, not the sub. When your Quads have reached their maximum SPL, the subs will still be coasting!
Bdp - your point is noted in general; but each case /room is unique. So lets acknowledge something here because it plays a big role in my space/room. The importance of the proper mating of a speakers system and amp/s. In this case the Music Reference RM10 and Quad 57's are joined at the hip - by design. (Thank u Mr. Modjeski).
In my space; with the 57's positioning and the nearfield sub, I am not reaching the 57's maximum SPL (yet) in that fairly large room with my listening habits. I am also only looking to fill in the bottom - without encroaching on the 57's output. Zero. The Matrix 800's in room A are the bass reference. I can hear what if anything I am missing in Room B. Both from an actual note and pressure (visceral) sense.

Btw your references to my ET Speakers. These are listed in my Notables Section of my virtual system page. Meaning good memories. Unfortunately no longer own them. :^(
They fell victim to the " I Just can't find a place to hide them from my wife scenario "

Audiophile Memory - Chilly Winter Day.
There they were, the ET LFT8a's and Modded Acoustats Model 3 upstairs not bothering anyone in a living room we don't use much anymore. I think it all came about after my wife found me in that room listening to the Model 3's with the OTL's . The heat from the amps shut the house thermostat which was in the room down. Rest of the House got cold. She came in and found me looking like I was enjoying the sand in Puerto Vallarta with a drink in hand - just no umbrella in it. Long story short I was forced to cull. So one day I reluctantly lined up the ET Lft8a and Accoustat up on one side like a Police line. It was a no decision. The differences in that room - the Models 3's made music sound like it was in a studio. The ET's sounded more like in a hall. More ambient info. Both good. ET's could be replaced one day so they had to go. In comparison the Quad's 57's sound is live at the Microphone with voices.......
note:
I had the A version's not the B's of the ET's. Thought about getting Bruce to send me the tweeters to make them b's but changed my mind because of the setup. Going by memory - the A version tweeter panels are dipole, don't have the material in the speaker tweeter panel (if I remember right) blocking the back wave. Being a tall narrow speaker the A version allowed you to place them on the sides of the wall (midfield) in a long narrow room. One on each side. You could get imaging at both sides of a long room this way. It was so cool. Miss them.

Bdp - are u familair with the Vandersteen 2wq's subs. Any thoughts in regards to compatibility with the 57's ?

Anyone else used or heard them with 57's ?

ct0517 November 05, 2015 07:10

Bdp24 - The OB/Dipole sub is a completely different animal than any sealed or ported sub.
Bdp

Yes Indeed, I was surprised with Quad 57 in the subject line that he didn't hit on the OB sub in the emails and instead discussed the other subs. And I did not discuss DIY or finished. No problem. I wanted to hear him out and his responses to my emails were really fast.

Since you can't hear the Gr Research/Rythmik OB/Dipole Sub before purchase, I highly recommend reading all about it on the GR AudioCircle Forum
Yes will do more reading on it. I'd like to learn more about it.

GR Audiocircle OB Sub

Once this November T Shirt and Flip Flop weather goes away for good.

Thanks for making me aware of this product. Also Considering DIY..

Bdp24 - As to locating subs nearfield to reduce possible distortion, consider this: The limiting factor in a hybrid loudspeaker/sub pairing will be the maximum output of your loudspeakers, not the sub. When your Quads have reached their maximum SPL, the subs will still be coasting!
Bdp - your point is noted in general; but each case /room is unique. So lets acknowledge something here because it plays a big role in my space/room. The importance of the proper mating of a speakers system and amp/s. In this case the Music Reference RM10 and Quad 57's are joined at the hip - by design. (Thank u Mr. Modjeski).
In my space; with the 57's positioning and the nearfield sub, I am not reaching the 57's maximum SPL (yet) in that fairly large room with my listening habits. I am also only looking to fill in the bottom - without encroaching on the 57's output. Zero. The Matrix 800's in room A are the bass reference. I can hear what if anything I am missing in Room B. Both from an actual note and pressure (visceral) sense.

Btw your references to my ET Speakers. These are listed in my Notables Section of my virtual system page. Meaning good memories. Unfortunately no longer own them. :^(
They fell victim to the " I Just can't find a place to hide them from my wife scenario "

Audiophile Memory - Chilly Winter Day.
There they were, the ET LFT8a's and Modded Acoustats Model 3 upstairs not bothering anyone in a living room we don't use much anymore. I think it all came about after my wife found me in that room listening to the Model 3's with the OTL's . The heat from the amps shut the house thermostat which was in the room down. Rest of the House got cold. She came in and found me looking like I was enjoying the sand in Puerto Vallarta with a drink in hand - just no umbrella in it. Long story short I was forced to cull. So one day I reluctantly lined up the ET Lft8a and Accoustat up on one side like a Police line. It was a no decision. The differences in that room - the Models 3's made music sound like it was in a studio. The ET's sounded more like in a hall. More ambient info. Both good. ET's could be replaced one day so they had to go. In comparison the Quad's 57's sound is live at the Microphone with voices.......
note:
I had the A version's not the B's of the ET's. Thought about getting Bruce to send me the tweeters to make them b's but changed my mind because of the setup. Going by memory - the A version tweeter panels are dipole, don't have the material in the speaker tweeter panel (if I remember right) blocking the back wave. Being a tall narrow speaker the A version allowed you to place them on the sides of the wall (midfield) in a long narrow room. One on each side. You could get imaging at both sides of a long room this way. It was so cool. Miss them.

Bdp - are u familair with the Vandersteen 2wq's subs. Any thoughts in regards to compatibility with the 57's ?

Anyone else used or heard them with 57's ?

ct0517 November 05, 2015 07:10

Bdp24 - The OB/Dipole sub is a completely different animal than any sealed or ported sub.
Bdp

Yes Indeed, I was surprised with Quad 57 in the subject line that he didn't hit on the OB sub in the emails and instead discussed the other subs. And I did not discuss DIY or finished. No problem. I wanted to hear him out and his responses to my emails were really fast.

Since you can't hear the Gr Research/Rythmik OB/Dipole Sub before purchase, I highly recommend reading all about it on the GR AudioCircle Forum
Yes will do more reading on it. I'd like to learn more about it.

GR Audiocircle OB Sub

Once this November T Shirt and Flip Flop weather goes away for good.

Thanks for making me aware of this product. Also Considering DIY..

Bdp24 - As to locating subs nearfield to reduce possible distortion, consider this: The limiting factor in a hybrid loudspeaker/sub pairing will be the maximum output of your loudspeakers, not the sub. When your Quads have reached their maximum SPL, the subs will still be coasting!
Bdp - your point is noted in general; but each case /room is unique. So lets acknowledge something here because it plays a big role in my space/room. The importance of the proper mating of a speakers system and amp/s. In this case the Music Reference RM10 and Quad 57's are joined at the hip - by design. (Thank u Mr. Modjeski).
In my space; with the 57's positioning and the nearfield sub, I am not reaching the 57's maximum SPL (yet) in that fairly large room with my listening habits. I am also only looking to fill in the bottom - without encroaching on the 57's output. Zero. The Matrix 800's in room A are the bass reference. I can hear what if anything I am missing in Room B. Both from an actual note and pressure (visceral) sense.

Btw your references to my ET Speakers. These are listed in my Notables Section of my virtual system page. Meaning good memories. Unfortunately no longer own them. :^(
They fell victim to the " I Just can't find a place to hide them from my wife scenario "

Audiophile Memory - Chilly Winter Day.
There they were, the ET LFT8a's and Modded Acoustats Model 3 upstairs not bothering anyone in a living room we don't use much anymore. I think it all came about after my wife found me in that room listening to the Model 3's with the OTL's . The heat from the amps shut the house thermostat which was in the room down. Rest of the House got cold. She came in and found me looking like I was enjoying the sand in Puerto Vallarta with a drink in hand - just no umbrella in it. Long story short I was forced to cull. So one day I reluctantly lined up the ET Lft8a and Accoustat up on one side like a Police line. It was a no decision. The differences in that room - the Models 3's made music sound like it was in a studio. The ET's sounded more like in a hall. More ambient info. Both good. ET's could be replaced one day so they had to go. In comparison the Quad's 57's sound is live at the Microphone with voices.......
note:
I had the A version's not the B's of the ET's. Thought about getting Bruce to send me the tweeters to make them b's but changed my mind because of the setup. Going by memory - the A version tweeter panels are dipole, don't have the material in the speaker tweeter panel (if I remember right) blocking the back wave. Being a tall narrow speaker the A version allowed you to place them on the sides of the wall (midfield) in a long narrow room. One on each side. You could get imaging at both sides of a long room this way. It was so cool. Miss them.

Bdp - are u familair with the Vandersteen 2wq's subs. Any thoughts in regards to compatibility with the 57's ?

Anyone else used or heard them with 57's ?

ct0517 November 05, 2015 07:10

Bdp24 - The OB/Dipole sub is a completely different animal than any sealed or ported sub.
Bdp

Yes Indeed, I was surprised with Quad 57 in the subject line that he didn't hit on the OB sub in the emails and instead discussed the other subs. And I did not discuss DIY or finished. No problem. I wanted to hear him out and his responses to my emails were really fast.

Since you can't hear the Gr Research/Rythmik OB/Dipole Sub before purchase, I highly recommend reading all about it on the GR AudioCircle Forum
Yes will do more reading on it. I'd like to learn more about it.

GR Audiocircle OB Sub

Once this November T Shirt and Flip Flop weather goes away for good.

Thanks for making me aware of this product. Also Considering DIY..

Bdp24 - As to locating subs nearfield to reduce possible distortion, consider this: The limiting factor in a hybrid loudspeaker/sub pairing will be the maximum output of your loudspeakers, not the sub. When your Quads have reached their maximum SPL, the subs will still be coasting!
Bdp - your point is noted in general; but each case /room is unique. So lets acknowledge something here because it plays a big role in my space/room. The importance of the proper mating of a speakers system and amp/s. In this case the Music Reference RM10 and Quad 57's are joined at the hip - by design. (Thank u Mr. Modjeski).
In my space; with the 57's positioning and the nearfield sub, I am not reaching the 57's maximum SPL (yet) in that fairly large room with my listening habits. I am also only looking to fill in the bottom - without encroaching on the 57's output. Zero. The Matrix 800's in room A are the bass reference. I can hear what if anything I am missing in Room B. Both from an actual note and pressure (visceral) sense.

Btw your references to my ET Speakers. These are listed in my Notables Section of my virtual system page. Meaning good memories. Unfortunately no longer own them. :^(
They fell victim to the " I Just can't find a place to hide them from my wife scenario "

Audiophile Memory - Chilly Winter Day.
There they were, the ET LFT8a's and Modded Acoustats Model 3 upstairs not bothering anyone in a living room we don't use much anymore. I think it all came about after my wife found me in that room listening to the Model 3's with the OTL's . The heat from the amps shut the house thermostat which was in the room down. Rest of the House got cold. She came in and found me looking like I was enjoying the sand in Puerto Vallarta with a drink in hand - just no umbrella in it. Long story short I was forced to cull. So one day I reluctantly lined up the ET Lft8a and Accoustat up on one side like a Police line. It was a no decision. The differences in that room - the Models 3's made music sound like it was in a studio. The ET's sounded more like in a hall. More ambient info. Both good. ET's could be replaced one day so they had to go. In comparison the Quad's 57's sound is live at the Microphone with voices.......
note:
I had the A version's not the B's of the ET's. Thought about getting Bruce to send me the tweeters to make them b's but changed my mind because of the setup. Going by memory - the A version tweeter panels are dipole, don't have the material in the speaker tweeter panel (if I remember right) blocking the back wave. Being a tall narrow speaker the A version allowed you to place them on the sides of the wall (midfield) in a long narrow room. One on each side. You could get imaging at both sides of a long room this way. It was so cool. Miss them.

Bdp - are u familair with the Vandersteen 2wq's subs. Any thoughts in regards to compatibility with the 57's ?

Anyone else used or heard them with 57's ?

ct0517 November 05, 2015 07:10

Bdp24 - The OB/Dipole sub is a completely different animal than any sealed or ported sub.
Bdp

Yes Indeed, I was surprised with Quad 57 in the subject line that he didn't hit on the OB sub in the emails and instead discussed the other subs. And I did not discuss DIY or finished. No problem. I wanted to hear him out and his responses to my emails were really fast.

Since you can't hear the Gr Research/Rythmik OB/Dipole Sub before purchase, I highly recommend reading all about it on the GR AudioCircle Forum
Yes will do more reading on it. I'd like to learn more about it.

GR Audiocircle OB Sub

Once this November T Shirt and Flip Flop weather goes away for good.

Thanks for making me aware of this product. Also Considering DIY..

Bdp24 - As to locating subs nearfield to reduce possible distortion, consider this: The limiting factor in a hybrid loudspeaker/sub pairing will be the maximum output of your loudspeakers, not the sub. When your Quads have reached their maximum SPL, the subs will still be coasting!
Bdp - your point is noted in general; but each case /room is unique. So lets acknowledge something here because it plays a big role in my space/room. The importance of the proper mating of a speakers system and amp/s. In this case the Music Reference RM10 and Quad 57's are joined at the hip - by design. (Thank u Mr. Modjeski).
In my space; with the 57's positioning and the nearfield sub, I am not reaching the 57's maximum SPL (yet) in that fairly large room with my listening habits. I am also only looking to fill in the bottom - without encroaching on the 57's output. Zero. The Matrix 800's in room A are the bass reference. I can hear what if anything I am missing in Room B. Both from an actual note and pressure (visceral) sense.

Btw your references to my ET Speakers. These are listed in my Notables Section of my virtual system page. Meaning good memories. Unfortunately no longer own them. :^(
They fell victim to the " I Just can't find a place to hide them from my wife scenario "

Audiophile Memory - Chilly Winter Day.
There they were, the ET LFT8a's and Modded Acoustats Model 3 upstairs not bothering anyone in a living room we don't use much anymore. I think it all came about after my wife found me in that room listening to the Model 3's with the OTL's . The heat from the amps shut the house thermostat which was in the room down. Rest of the House got cold. She came in and found me looking like I was enjoying the sand in Puerto Vallarta with a drink in hand - just no umbrella in it. Long story short I was forced to cull. So one day I reluctantly lined up the ET Lft8a and Accoustat up on one side like a Police line. It was a no decision. The differences in that room - the Models 3's made music sound like it was in a studio. The ET's sounded more like in a hall. More ambient info. Both good. ET's could be replaced one day so they had to go. In comparison the Quad's 57's sound is live at the Microphone with voices.......
note:
I had the A version's not the B's of the ET's. Thought about getting Bruce to send me the tweeters to make them b's but changed my mind because of the setup. Going by memory - the A version tweeter panels are dipole, don't have the material in the speaker tweeter panel (if I remember right) blocking the back wave. Being a tall narrow speaker the A version allowed you to place them on the sides of the wall (midfield) in a long narrow room. One on each side. You could get imaging at both sides of a long room this way. It was so cool. Miss them.

Bdp - are u familair with the Vandersteen 2wq's subs. Any thoughts in regards to compatibility with the 57's ?

Anyone else used or heard them with 57's ?

ct0517 November 05, 2015 07:10

Bdp24 - The OB/Dipole sub is a completely different animal than any sealed or ported sub.
Bdp

Yes Indeed, I was surprised with Quad 57 in the subject line that he didn't hit on the OB sub in the emails and instead discussed the other subs. And I did not discuss DIY or finished. No problem. I wanted to hear him out and his responses to my emails were really fast.

Since you can't hear the Gr Research/Rythmik OB/Dipole Sub before purchase, I highly recommend reading all about it on the GR AudioCircle Forum
Yes will do more reading on it. I'd like to learn more about it.

GR Audiocircle OB Sub

Once this November T Shirt and Flip Flop weather goes away for good.

Thanks for making me aware of this product. Also Considering DIY..

Bdp24 - As to locating subs nearfield to reduce possible distortion, consider this: The limiting factor in a hybrid loudspeaker/sub pairing will be the maximum output of your loudspeakers, not the sub. When your Quads have reached their maximum SPL, the subs will still be coasting!
Bdp - your point is noted in general; but each case /room is unique. So lets acknowledge something here because it plays a big role in my space/room. The importance of the proper mating of a speakers system and amp/s. In this case the Music Reference RM10 and Quad 57's are joined at the hip - by design. (Thank u Mr. Modjeski).
In my space; with the 57's positioning and the nearfield sub, I am not reaching the 57's maximum SPL (yet) in that fairly large room with my listening habits. I am also only looking to fill in the bottom - without encroaching on the 57's output. Zero. The Matrix 800's in room A are the bass reference. I can hear what if anything I am missing in Room B. Both from an actual note and pressure (visceral) sense.

Btw your references to my ET Speakers. These are listed in my Notables Section of my virtual system page. Meaning good memories. Unfortunately no longer own them. :^(
They fell victim to the " I Just can't find a place to hide them from my wife scenario "

Audiophile Memory - Chilly Winter Day.
There they were, the ET LFT8a's and Modded Acoustats Model 3 upstairs not bothering anyone in a living room we don't use much anymore. I think it all came about after my wife found me in that room listening to the Model 3's with the OTL's . The heat from the amps shut the house thermostat which was in the room down. Rest of the House got cold. She came in and found me looking like I was enjoying the sand in Puerto Vallarta with a drink in hand - just no umbrella in it. Long story short I was forced to cull. So one day I reluctantly lined up the ET Lft8a and Accoustat up on one side like a Police line. It was a no decision. The differences in that room - the Models 3's made music sound like it was in a studio. The ET's sounded more like in a hall. More ambient info. Both good. ET's could be replaced one day so they had to go. In comparison the Quad's 57's sound is live at the Microphone with voices.......
note:
I had the A version's not the B's of the ET's. Thought about getting Bruce to send me the tweeters to make them b's but changed my mind because of the setup. Going by memory - the A version tweeter panels are dipole, don't have the material in the speaker tweeter panel (if I remember right) blocking the back wave. Being a tall narrow speaker the A version allowed you to place them on the sides of the wall (midfield) in a long narrow room. One on each side. You could get imaging at both sides of a long room this way. It was so cool. Miss them.

Bdp - are u familair with the Vandersteen 2wq's subs. Any thoughts in regards to compatibility with the 57's ?

Anyone else used or heard them with 57's ?

ct0517 November 05, 2015 07:10

Bdp24 - The OB/Dipole sub is a completely different animal than any sealed or ported sub.
Bdp

Yes Indeed, I was surprised with Quad 57 in the subject line that he didn't hit on the OB sub in the emails and instead discussed the other subs. And I did not discuss DIY or finished. No problem. I wanted to hear him out and his responses to my emails were really fast.

Since you can't hear the Gr Research/Rythmik OB/Dipole Sub before purchase, I highly recommend reading all about it on the GR AudioCircle Forum
Yes will do more reading on it. I'd like to learn more about it.

GR Audiocircle OB Sub

Once this November T Shirt and Flip Flop weather goes away for good.

Thanks for making me aware of this product. Also Considering DIY..

Bdp24 - As to locating subs nearfield to reduce possible distortion, consider this: The limiting factor in a hybrid loudspeaker/sub pairing will be the maximum output of your loudspeakers, not the sub. When your Quads have reached their maximum SPL, the subs will still be coasting!
Bdp - your point is noted in general; but each case /room is unique. So lets acknowledge something here because it plays a big role in my space/room. The importance of the proper mating of a speakers system and amp/s. In this case the Music Reference RM10 and Quad 57's are joined at the hip - by design. (Thank u Mr. Modjeski).
In my space; with the 57's positioning and the nearfield sub, I am not reaching the 57's maximum SPL (yet) in that fairly large room with my listening habits. I am also only looking to fill in the bottom - without encroaching on the 57's output. Zero. The Matrix 800's in room A are the bass reference. I can hear what if anything I am missing in Room B. Both from an actual note and pressure (visceral) sense.

Btw your references to my ET Speakers. These are listed in my Notables Section of my virtual system page. Meaning good memories. Unfortunately no longer own them. :^(
They fell victim to the " I Just can't find a place to hide them from my wife scenario "

Audiophile Memory - Chilly Winter Day.
There they were, the ET LFT8a's and Modded Acoustats Model 3 upstairs not bothering anyone in a living room we don't use much anymore. I think it all came about after my wife found me in that room listening to the Model 3's with the OTL's . The heat from the amps shut the house thermostat which was in the room down. Rest of the House got cold. She came in and found me looking like I was enjoying the sand in Puerto Vallarta with a drink in hand - just no umbrella in it. Long story short I was forced to cull. So one day I reluctantly lined up the ET Lft8a and Accoustat up on one side like a Police line. It was a no decision. The differences in that room - the Models 3's made music sound like it was in a studio. The ET's sounded more like in a hall. More ambient info. Both good. ET's could be replaced one day so they had to go. In comparison the Quad's 57's sound is live at the Microphone with voices.......
note:
I had the A version's not the B's of the ET's. Thought about getting Bruce to send me the tweeters to make them b's but changed my mind because of the setup. Going by memory - the A version tweeter panels are dipole, don't have the material in the speaker tweeter panel (if I remember right) blocking the back wave. Being a tall narrow speaker the A version allowed you to place them on the sides of the wall (midfield) in a long narrow room. One on each side. You could get imaging at both sides of a long room this way. It was so cool. Miss them.

Bdp - are u familair with the Vandersteen 2wq's subs. Any thoughts in regards to compatibility with the 57's ?

Anyone else used or heard them with 57's ?

ct0517 November 05, 2015 07:10

Bdp24 - The OB/Dipole sub is a completely different animal than any sealed or ported sub.
Bdp

Yes Indeed, I was surprised with Quad 57 in the subject line that he didn't hit on the OB sub in the emails and instead discussed the other subs. And I did not discuss DIY or finished. No problem. I wanted to hear him out and his responses to my emails were really fast.

Since you can't hear the Gr Research/Rythmik OB/Dipole Sub before purchase, I highly recommend reading all about it on the GR AudioCircle Forum
Yes will do more reading on it. I'd like to learn more about it.

GR Audiocircle OB Sub

Once this November T Shirt and Flip Flop weather goes away for good.

Thanks for making me aware of this product. Also Considering DIY..

Bdp24 - As to locating subs nearfield to reduce possible distortion, consider this: The limiting factor in a hybrid loudspeaker/sub pairing will be the maximum output of your loudspeakers, not the sub. When your Quads have reached their maximum SPL, the subs will still be coasting!
Bdp - your point is noted in general; but each case /room is unique. So lets acknowledge something here because it plays a big role in my space/room. The importance of the proper mating of a speakers system and amp/s. In this case the Music Reference RM10 and Quad 57's are joined at the hip - by design. (Thank u Mr. Modjeski).
In my space; with the 57's positioning and the nearfield sub, I am not reaching the 57's maximum SPL (yet) in that fairly large room with my listening habits. I am also only looking to fill in the bottom - without encroaching on the 57's output. Zero. The Matrix 800's in room A are the bass reference. I can hear what if anything I am missing in Room B. Both from an actual note and pressure (visceral) sense.

Btw your references to my ET Speakers. These are listed in my Notables Section of my virtual system page. Meaning good memories. Unfortunately no longer own them. :^(
They fell victim to the " I Just can't find a place to hide them from my wife scenario "

Audiophile Memory - Chilly Winter Day.
There they were, the ET LFT8a's and Modded Acoustats Model 3 upstairs not bothering anyone in a living room we don't use much anymore. I think it all came about after my wife found me in that room listening to the Model 3's with the OTL's . The heat from the amps shut the house thermostat which was in the room down. Rest of the House got cold. She came in and found me looking like I was enjoying the sand in Puerto Vallarta with a drink in hand - just no umbrella in it. Long story short I was forced to cull. So one day I reluctantly lined up the ET Lft8a and Accoustat up on one side like a Police line. It was a no decision. The differences in that room - the Models 3's made music sound like it was in a studio. The ET's sounded more like in a hall. More ambient info. Both good. ET's could be replaced one day so they had to go. In comparison the Quad's 57's sound is live at the Microphone with voices.......
note:
I had the A version's not the B's of the ET's. Thought about getting Bruce to send me the tweeters to make them b's but changed my mind because of the setup. Going by memory - the A version tweeter panels are dipole, don't have the material in the speaker tweeter panel (if I remember right) blocking the back wave. Being a tall narrow speaker the A version allowed you to place them on the sides of the wall (midfield) in a long narrow room. One on each side. You could get imaging at both sides of a long room this way. It was so cool. Miss them.

Bdp - are u familair with the Vandersteen 2wq's subs. Any thoughts in regards to compatibility with the 57's ?

Anyone else used or heard them with 57's ?

ct0517 November 05, 2015 07:10

Bdp24 - The OB/Dipole sub is a completely different animal than any sealed or ported sub.
Bdp

Yes Indeed, I was surprised with Quad 57 in the subject line that he didn't hit on the OB sub in the emails and instead discussed the other subs. And I did not discuss DIY or finished. No problem. I wanted to hear him out and his responses to my emails were really fast.

Since you can't hear the Gr Research/Rythmik OB/Dipole Sub before purchase, I highly recommend reading all about it on the GR AudioCircle Forum
Yes will do more reading on it. I'd like to learn more about it.

GR Audiocircle OB Sub

Once this November T Shirt and Flip Flop weather goes away for good.

Thanks for making me aware of this product. Also Considering DIY..

Bdp24 - As to locating subs nearfield to reduce possible distortion, consider this: The limiting factor in a hybrid loudspeaker/sub pairing will be the maximum output of your loudspeakers, not the sub. When your Quads have reached their maximum SPL, the subs will still be coasting!
Bdp - your point is noted in general; but each case /room is unique. So lets acknowledge something here because it plays a big role in my space/room. The importance of the proper mating of a speakers system and amp/s. In this case the Music Reference RM10 and Quad 57's are joined at the hip - by design. (Thank u Mr. Modjeski).
In my space; with the 57's positioning and the nearfield sub, I am not reaching the 57's maximum SPL (yet) in that fairly large room with my listening habits. I am also only looking to fill in the bottom - without encroaching on the 57's output. Zero. The Matrix 800's in room A are the bass reference. I can hear what if anything I am missing in Room B. Both from an actual note and pressure (visceral) sense.

Btw your references to my ET Speakers. These are listed in my Notables Section of my virtual system page. Meaning good memories. Unfortunately no longer own them. :^(
They fell victim to the " I Just can't find a place to hide them from my wife scenario "

Audiophile Memory - Chilly Winter Day.
There they were, the ET LFT8a's and Modded Acoustats Model 3 upstairs not bothering anyone in a living room we don't use much anymore. I think it all came about after my wife found me in that room listening to the Model 3's with the OTL's . The heat from the amps shut the house thermostat which was in the room down. Rest of the House got cold. She came in and found me looking like I was enjoying the sand in Puerto Vallarta with a drink in hand - just no umbrella in it. Long story short I was forced to cull. So one day I reluctantly lined up the ET Lft8a and Accoustat up on one side like a Police line. It was a no decision. The differences in that room - the Models 3's made music sound like it was in a studio. The ET's sounded more like in a hall. More ambient info. Both good. ET's could be replaced one day so they had to go. In comparison the Quad's 57's sound is live at the Microphone with voices.......
note:
I had the A version's not the B's of the ET's. Thought about getting Bruce to send me the tweeters to make them b's but changed my mind because of the setup. Going by memory - the A version tweeter panels are dipole, don't have the material in the speaker tweeter panel (if I remember right) blocking the back wave. Being a tall narrow speaker the A version allowed you to place them on the sides of the wall (midfield) in a long narrow room. One on each side. You could get imaging at both sides of a long room this way. It was so cool. Miss them.

Bdp - are u familair with the Vandersteen 2wq's subs. Any thoughts in regards to compatibility with the 57's ?

Anyone else used or heard them with 57's ?

ct0517 November 05, 2015 07:10

Bdp24 - The OB/Dipole sub is a completely different animal than any sealed or ported sub.
Bdp

Yes Indeed, I was surprised with Quad 57 in the subject line that he didn't hit on the OB sub in the emails and instead discussed the other subs. And I did not discuss DIY or finished. No problem. I wanted to hear him out and his responses to my emails were really fast.

Since you can't hear the Gr Research/Rythmik OB/Dipole Sub before purchase, I highly recommend reading all about it on the GR AudioCircle Forum
Yes will do more reading on it. I'd like to learn more about it.

GR Audiocircle OB Sub

Once this November T Shirt and Flip Flop weather goes away for good.

Thanks for making me aware of this product. Also Considering DIY..

Bdp24 - As to locating subs nearfield to reduce possible distortion, consider this: The limiting factor in a hybrid loudspeaker/sub pairing will be the maximum output of your loudspeakers, not the sub. When your Quads have reached their maximum SPL, the subs will still be coasting!
Bdp - your point is noted in general; but each case /room is unique. So lets acknowledge something here because it plays a big role in my space/room. The importance of the proper mating of a speakers system and amp/s. In this case the Music Reference RM10 and Quad 57's are joined at the hip - by design. (Thank u Mr. Modjeski).
In my space; with the 57's positioning and the nearfield sub, I am not reaching the 57's maximum SPL (yet) in that fairly large room with my listening habits. I am also only looking to fill in the bottom - without encroaching on the 57's output. Zero. The Matrix 800's in room A are the bass reference. I can hear what if anything I am missing in Room B. Both from an actual note and pressure (visceral) sense.

Btw your references to my ET Speakers. These are listed in my Notables Section of my virtual system page. Meaning good memories. Unfortunately no longer own them. :^(
They fell victim to the " I Just can't find a place to hide them from my wife scenario "

Audiophile Memory - Chilly Winter Day.
There they were, the ET LFT8a's and Modded Acoustats Model 3 upstairs not bothering anyone in a living room we don't use much anymore. I think it all came about after my wife found me in that room listening to the Model 3's with the OTL's . The heat from the amps shut the house thermostat which was in the room down. Rest of the House got cold. She came in and found me looking like I was enjoying the sand in Puerto Vallarta with a drink in hand - just no umbrella in it. Long story short I was forced to cull. So one day I reluctantly lined up the ET Lft8a and Accoustat up on one side like a Police line. It was a no decision. The differences in that room - the Models 3's made music sound like it was in a studio. The ET's sounded more like in a hall. More ambient info. Both good. ET's could be replaced one day so they had to go. In comparison the Quad's 57's sound is live at the Microphone with voices.......
note:
I had the A version's not the B's of the ET's. Thought about getting Bruce to send me the tweeters to make them b's but changed my mind because of the setup. Going by memory - the A version tweeter panels are dipole, don't have the material in the speaker tweeter panel (if I remember right) blocking the back wave. Being a tall narrow speaker the A version allowed you to place them on the sides of the wall (midfield) in a long narrow room. One on each side. You could get imaging at both sides of a long room this way. It was so cool. Miss them.

Bdp - are u familair with the Vandersteen 2wq's subs. Any thoughts in regards to compatibility with the 57's ?

Anyone else used or heard them with 57's ?

ct0517 November 05, 2015 07:10

Bdp24 - The OB/Dipole sub is a completely different animal than any sealed or ported sub.
Bdp

Yes Indeed, I was surprised with Quad 57 in the subject line that he didn't hit on the OB sub in the emails and instead discussed the other subs. And I did not discuss DIY or finished. No problem. I wanted to hear him out and his responses to my emails were really fast.

Since you can't hear the Gr Research/Rythmik OB/Dipole Sub before purchase, I highly recommend reading all about it on the GR AudioCircle Forum
Yes will do more reading on it. I'd like to learn more about it.

GR Audiocircle OB Sub

Once this November T Shirt and Flip Flop weather goes away for good.

Thanks for making me aware of this product. Also Considering DIY..

Bdp24 - As to locating subs nearfield to reduce possible distortion, consider this: The limiting factor in a hybrid loudspeaker/sub pairing will be the maximum output of your loudspeakers, not the sub. When your Quads have reached their maximum SPL, the subs will still be coasting!
Bdp - your point is noted in general; but each case /room is unique. So lets acknowledge something here because it plays a big role in my space/room. The importance of the proper mating of a speakers system and amp/s. In this case the Music Reference RM10 and Quad 57's are joined at the hip - by design. (Thank u Mr. Modjeski).
In my space; with the 57's positioning and the nearfield sub, I am not reaching the 57's maximum SPL (yet) in that fairly large room with my listening habits. I am also only looking to fill in the bottom - without encroaching on the 57's output. Zero. The Matrix 800's in room A are the bass reference. I can hear what if anything I am missing in Room B. Both from an actual note and pressure (visceral) sense.

Btw your references to my ET Speakers. These are listed in my Notables Section of my virtual system page. Meaning good memories. Unfortunately no longer own them. :^(
They fell victim to the " I Just can't find a place to hide them from my wife scenario "

Audiophile Memory - Chilly Winter Day.
There they were, the ET LFT8a's and Modded Acoustats Model 3 upstairs not bothering anyone in a living room we don't use much anymore. I think it all came about after my wife found me in that room listening to the Model 3's with the OTL's . The heat from the amps shut the house thermostat which was in the room down. Rest of the House got cold. She came in and found me looking like I was enjoying the sand in Puerto Vallarta with a drink in hand - just no umbrella in it. Long story short I was forced to cull. So one day I reluctantly lined up the ET Lft8a and Accoustat up on one side like a Police line. It was a no decision. The differences in that room - the Models 3's made music sound like it was in a studio. The ET's sounded more like in a hall. More ambient info. Both good. ET's could be replaced one day so they had to go. In comparison the Quad's 57's sound is live at the Microphone with voices.......
note:
I had the A version's not the B's of the ET's. Thought about getting Bruce to send me the tweeters to make them b's but changed my mind because of the setup. Going by memory - the A version tweeter panels are dipole, don't have the material in the speaker tweeter panel (if I remember right) blocking the back wave. Being a tall narrow speaker the A version allowed you to place them on the sides of the wall (midfield) in a long narrow room. One on each side. You could get imaging at both sides of a long room this way. It was so cool. Miss them.

Bdp - are u familair with the Vandersteen 2wq's subs. Any thoughts in regards to compatibility with the 57's ?

Anyone else used or heard them with 57's ?

ct0517 November 05, 2015 07:10

Ct, the OB/Dipole sub is a completely different animal than any sealed or ported sub. If you want a plug & play Rythmik sub, you'll need to go with the F15HP (or the smaller E15HP; same amp and woofer, just a slightly smaller cabinet). The OB/Dipole is available only as a kit (a plate amp and two 12" woofers), the W-or H-frame the woofers are installed in needing to be custom built. But you could have the frame(s) built for you locally, from the diagrams on the GR Research site. The GR Research Forum on AudioCircle is where you can find all the discussion of the OB/Dipole sub, not on the Rythmik AVS Forum.

The back-and-forth with Rythmik you've been having has been with Brian's right hand man Enrico. You can see his set-up, including sub locations, in his profile.

Your finding of subs being "slower" than your Quads is of course very common amongst not just Quad owners, but all planar owners, especially those of electrostatics. The seeming slowness, or lack of speed, of subs comes not from their inability to follow the steep front edge of a transient, but in their inability to "stop" when the signal does, referred to as "overshoot". Rythmiks in contrast "stop on a dime" as the old expression goes. Another reason is the relatively high moving mass of a lot of subwoofer cones, the mass storing energy. Mass is often added to woofer cones to lower their resonant frequency, but not without a penalty---the added mass and stored energy decreases the driver's "inter-transient silence", resulting in a less transparent sound. Brian Ding has a patented Direct Servo Feedback design in his plate amps and woofers, and it makes for a very clean, quick, transparent sound from the custom-made 8, 12, and 15 inch drivers.

The OB/Dipole sub I thought would be of particular interest to you Ct. It is an even better match with both your Quad and Eminent Technology loudspeakers than a regular Rythmik. The sub includes the DSF design, but the Dipole design and configuration gives it several advantages over a sealed or ported sub for use with planar speakers. First, it has the same figure-of-8 radiation pattern as planar loudspeakers, with a null at each side, so the sub can be placed side-by-side with the planar (allowing the use of a higher x/o frequency, for instance the 180Hz of the ET LFT-8b). Secondly, the fall-off of output with increasing distance from a speaker is less with planars than non-planars (including subs); with a Dipole sub, the balance between it and any planar loudspeaker remains constant, no matter the listening distance. That is NOT true of a planar loudspeaker with a non-planar sub, the balance between those two varying according to listening distance.

As to locating subs nearfield to reduce possible distortion, consider this: The limiting factor in a hybrid loudspeaker/sub pairing will be the maximum output of your loudspeakers, not the sub. When your Quads have reached their maximum SPL, the subs will still be coasting! The choice of sub location can therefore be determined from other considerations, it's seamless integration with the loudspeakers being the priority, I presume. Since you can't hear the Gr Research/Rythmik OB/Dipole Sub before purchase, I highly recommend reading all about it on the GR AudioCircle Forum. It's VERY special!

bdp24 November 04, 2015 15:36

Ct, the OB/Dipole sub is a completely different animal than any sealed or ported sub. If you want a plug & play Rythmik sub, you'll need to go with the F15HP (or the smaller E15HP; same amp and woofer, just a slightly smaller cabinet). The OB/Dipole is available only as a kit (a plate amp and two 12" woofers), the W-or H-frame the woofers are installed in needing to be custom built. But you could have the frame(s) built for you locally, from the diagrams on the GR Research site. The GR Research Forum on AudioCircle is where you can find all the discussion of the OB/Dipole sub, not on the Rythmik AVS Forum.

The back-and-forth with Rythmik you've been having has been with Brian's right hand man Enrico. You can see his set-up, including sub locations, in his profile.

Your finding of subs being "slower" than your Quads is of course very common amongst not just Quad owners, but all planar owners, especially those of electrostatics. The seeming slowness, or lack of speed, of subs comes not from their inability to follow the steep front edge of a transient, but in their inability to "stop" when the signal does, referred to as "overshoot". Rythmiks in contrast "stop on a dime" as the old expression goes. Another reason is the relatively high moving mass of a lot of subwoofer cones, the mass storing energy. Mass is often added to woofer cones to lower their resonant frequency, but not without a penalty---the added mass and stored energy decreases the driver's "inter-transient silence", resulting in a less transparent sound. Brian Ding has a patented Direct Servo Feedback design in his plate amps and woofers, and it makes for a very clean, quick, transparent sound from the custom-made 8, 12, and 15 inch drivers.

The OB/Dipole sub I thought would be of particular interest to you Ct. It is an even better match with both your Quad and Eminent Technology loudspeakers than a regular Rythmik. The sub includes the DSF design, but the Dipole design and configuration gives it several advantages over a sealed or ported sub for use with planar speakers. First, it has the same figure-of-8 radiation pattern as planar loudspeakers, with a null at each side, so the sub can be placed side-by-side with the planar (allowing the use of a higher x/o frequency, for instance the 180Hz of the ET LFT-8b). Secondly, the fall-off of output with increasing distance from a speaker is less with planars than non-planars (including subs); with a Dipole sub, the balance between it and any planar loudspeaker remains constant, no matter the listening distance. That is NOT true of a planar loudspeaker with a non-planar sub, the balance between those two varying according to listening distance.

As to locating subs nearfield to reduce possible distortion, consider this: The limiting factor in a hybrid loudspeaker/sub pairing will be the maximum output of your loudspeakers, not the sub. When your Quads have reached their maximum SPL, the subs will still be coasting! The choice of sub location can therefore be determined from other considerations, it's seamless integration with the loudspeakers being the priority, I presume. Since you can't hear the Gr Research/Rythmik OB/Dipole Sub before purchase, I highly recommend reading all about it on the GR AudioCircle Forum. It's VERY special!

bdp24 November 04, 2015 15:36