..., always a sensitive and potentially highly controversial topic, please do not feel offended by any comment I make. I am no expert on any Amp class type and/or amplified sound qualities. I am only trying to understand how there can be differences in reproduced sound.Well guys, I'm in the pro-audio since early 1990 and the only thing I have to say is that "there is a big difference" between amps and I will put an example from my personal experience : Back in 1999, I won a contract to upgrade an auditorium sound system that has an EV 2 way active system 4 tops+4 subs all with QSC MX 3000 & 4000 amplifiers. So before moving to a new speaker system , I switched all amplifiers and tested with Lab-Gruppen FP series and the sound changed absolutely , so big was the difference in sound quality that I did an A/B comparison test with the same system : L with the original QSC amps & R with the Lab Gruppen and that's it and the difference was immediately noticed.
This is my personal experience and there's a big difference between amps, at least in the pro-audio field.
Alan I wonder..., if a third party had set-up the new amps to reproduce sound similar to the amps being replaced (before your first listening) would the sound you first heard be as starkly different.
But I wonder too did you replace an old Class A with a new Class AB and/or transistorized AB. I am learning that some of the newer transistor AB amps can get the cross-over distortions to nearly non-existent. Most amp designers and builders today are able to achieve and maintain low distortion levels in sound amplification for moderate dollar values etc etc
I could be wrong but I believe the original question is, "can you hear a difference between two amps of similar design when each is set up to reproduce their best sound or a similar sound...?" Seems to me there was a $10,000 challenge. If anyone can hear a difference between a $1000 amp and a $10,000 (approx) amp of similar Class Type in a "Double Blind Placebo Controlled Study" when each amp is set-up to reproduce its best sound, all other variables being equal... :scratch:
You'll have to do the research on this if you want to reproduce the original experiment using newer equipment. But I'd love to watch and listen and contribute what I can. :innocent:
Alan I believe your statement was in response to your experience and I believe you did hear a difference but I believe one long standing question on this is... "why?"
Thanks for your comment - i love this question :surprise: