My nerd cave. Happy to talk merits and limitations of system. Always thinking about better sound, without lamenting the way things are now. New room in 2023 with 2 sheets of 5/8" sheetorck with Green Glue in between, suspended off of rubber connectors to aluminum hat channel, plus 2 layers of rock wool. All outlets sealed with putty. 10/2 line to power amp, dedicated circuit for electronics.
The cool thing is babies works so well and strange shaped rooms. Johnny Rutan of audio connection reads and posts on this forum. He is more than willing to help anybody get the most out of them.
He has upgrades for the 3's to Signatures. It's not cheap and it's only for original over I believe, but it's a whole new speaker. Not even close. It's got the woven midrange that's FAST and it just sounds right. Has lower bass than my Treo's, but not as controlled. Still they are an amazing speaker, especially in that price range. Personally I went for the Treo's as they are basically the Quattro's without the built in sub. I can now listen all day long and not get fatigued.