Why do audiophiles shun feedback in amplifiers?

The problem with too much focus on negative feedback is that not all amps that use it are created equal. They do things differently and to different degrees.

I have heard some including mine deliver all the goods including bass quite well and naturally for both acoustic and electronic instruments, semantics aside.

Most are probably not able to discern from technical specs a good implementation versus a not so good one. One has to trust their ears. Generalizations focused on one of many design principles that go into these things are of little value IMHO. There is no consensus on this, even among experienced EEs and amp designers, obviously. So try various amps with various designs for oneself and see. Or just go with your gut but be sure to always focus on technical synergies between specific amps and speakers if you do, otherwise all bets are off.

Atmasphere, Now I got it. Thanks!

Mapman, I agree with you. The ears have the final say. That is why I posted. IME, negative feedback is beneficial.

Atmasphere, It depends how tight is tight. Acoustic bass is the tightest type because of the very longest scale. On the other side of the spectrum is Paul McCartney's Hofner Violin bass that has very short scale and horrible definition. I believe McCartney started using longer scale Rickenbacker first time in "Paperback Writer" and it shows - much tighter bass. The best recorded bass (very tight) I have is on Chick Corea "Akoustic Band" and it is upright bass. Perhaps at 7th grade you couldn't afford good instrument?

Ralph I think we're confusing semantics regarding 'tight' bass. To me, a KT88 amp with feedback has more natural bass than most SET amp with no feedback or for that matter an OTL amp with miss matched speakers.