I spoke to Bob Crump many times from 98 to 2005 about audio and he always answered my questions.
He was one of the smartest guys when it came to audio.
Sadly Bob passed away in 2005.
Here's a thread about it.
http://forum.audiogon.com/cgi-bin/fr.pl?aamps&1133211725

doug99 September 08, 2012 13:54

Raul, used some teflon caps and 100hz X'over point with both, yes I run stereo subwoofers, subwoofers.

rcrump February 08, 2005 09:52

Dear Bob: Which is the crossover frecuency with your subwoofer? and why only one subwoofer?
BTW, great audio system.
Regards and enjoy the music.
Raul.

rauliruegas November 19, 2004 11:04

Wow, Bob, You and Brian Walsh have EXTREMELY IMPRESSIVE SYSTEMS!!Probably a couple of the best on Agon!
I am impressed! Keep up the excellent work!

daltonlanny May 12, 2004 12:18

The Sound Lab U-1s sounded a bunch better at Brian's place than at the meeting as there was such a small sweet spot in that meeting room.....I traded Dr. West a preamp for a set of the M-1s.....

rcrump November 23, 2003 22:58

Did you enjoy the Chicago Audio Society meeting where they used the big Soundlabs?

nrchy November 02, 2003 14:39

Oh Lordy, have ordered a set of Sound Lab M-1s! Expect they will arrive next Spring..........No plans to sell the Rockports.......

rcrump November 02, 2003 09:09

New Interconnects throughout, TG Audio HSR - High Purity which are the same design as the regular HSR, but made with better material....

rcrump April 01, 2003 09:55

I have record storage down both walls of the listening room across from each other, about 7' high by 8' wide, one on each side.....Keep duplicates under the record cleaner and have more storage in the dining room.....

rcrump October 01, 2002 21:28

Thanks for the follow-up Bob, if anyone can do it, you guys sure can; sorry, I definitely can't foot that bill. :-) I asked the question regarding tube equipment b/c I've seen and heard your mod work on a friend's ARC preamp, which took it to another planet. (Since he doesn't have his system set up currently, he brings it over occasionally to embarrass my preamp) Saw the pics of your system on the Asylum, hope my pug also learns to use my amp as a space heater! But where are do you keep the rest of your records? ;-)

pug September 25, 2002 07:51

I think the last tube unit Curl designed was a crossover for Rockport a few years back....I haven't worked with tubes for well over a decade and would sure have to do a bunch of research into coupling capacitors.....Thompson has done some layouts for a manufacturer of a 300B amp and understand that really worked out well, but can't recall the brand name.......It is more challenging to make solid state gear perform IMHO than tubes and we have been concentrating on building the best we can do in solid state for the past few years....The Blowtorch line amp was modelled after the transconductance amplifier that Art Ferris (Audible Illusions) came up with a decade or more ago, but done in fets in lieu of tubes with no coupling caps or global feedback.....Nothing like triodes out there in the dead midrange and we might get there one day with a solid state amplifier as getting closer each time we build one....Think we are there with our preamp and we'll see how the reviews come back on the new JC-1 we designed for Parasound....I think it will take a four pole amp with choke input supply to rival the best tubed units and would love to build one, but the costs would be awfully high.....Parasound footed the bill and set parameters on the JC-1 and it would be nice to have another brave soul foot the bill on the four pole amp......

rcrump September 24, 2002 17:35

Nice...very nice. Out of curiosity, does CTC have any plans to design or build any tube-based equipment?

pug September 24, 2002 12:43

I don't have a clue how to post pictures here and am computer illiterate as well, but you can see some pitures I took of the system under inmate picture gallery on audio asylum under rcrump....Pictures or Stan & Freddy, my identical 17 year old cats (Freddy is almost twice as identical as Stan) in and around the listening room here.......I need a decent reference for my work in voicing gear and wires and the system fills the bill....I was broke for a year buying the table and then the speakers a year later back when TG Audio was merely a hobby business a decade ago as sure couldn't afford these pieces now....Could not list the Vendetta phono stage as not even a category for phono stages and audiogon misspelled Syzygy as well....

rcrump September 22, 2002 10:50

agree about posting photo(s)

geoffkait September 22, 2002 09:13

Bob- What about your dampening devices, Stan and Freddy, it only seems fair to give credit where credit is due. You should post some of those pictures you sent me they are impressive to say the least. I would post them but I am possibly the most computer clueless person here :)

tireguy September 22, 2002 08:23

Awesome layout Bob! Glad to see that quality analog rig in a reference system.

twl September 22, 2002 08:20