What is wrong with negative feedback?

There's open loop (global) and closed loop (local). Few designs can be stable into low impedance loads without some feedback and, if you read carefully, some advertise "no global feedback" and sometimes forget a word. In the case of op-amps, it's usually already there.

Easy to find all the negative things about negative feedback. I'm still waiting for someone to advertise positive feedback as being better :)

What about feed Forward ?

Like this?

http://www.wolcottaudio.com/WA_presence.htm

Appreciate Wolcott's integrity.

It makes the music sound less alive. I have a Mesa Baron amp, which has adjustable feedback levels, so it is easy to hear the difference. Increasing the feedback improves the specs, cleans up the bass a little, and robs the mids and highs of life and air. This matters less with heavily processed music (eg., pop or some rock,) which can even benefit (see "cleans up the bass" above) but it is fatal to acoustic or classical music.

I think you may see a response from Atmasphere (Ralph} as he in my opinion is one of the top amplifier designers in the industry;if he replies pay attention to his response.