for the record the rest of my system,aside from the new and old amp!are amc cd8b,p.s audio 4.5 vandersteen model 1,and also some tannoy proto j's.im about to replace the p.s audio in favor of an older preamp,believe it or not.im going to buy a thalia,well see what happens,thanks for all your helpfull advice!!!amp.
new amp vs old amp
i bought a acurus a150,i also have a dynaco st120,very different amps!one circa 1970 the other 1990'ish.ive done brief a/b testing,swapping them back and forth.my problem,i hear very little difference.why?do i need to listen longer?ive always though i had a good ear,i can here light notes and quiet backround instruments in music that most people cant!!!whats wrong