If you ge sucked into the music and it sounds bettef the longer you listen, you have a GOOD amp. Be happy. NF design is just one aspect. Alone, it means relatively little. No nfb designs in general might be better overall and there may be fewer nfb designs that sound "irritating", and ghere are certainly many mediocre products that use, nfb, but there are also many i have heard where fatigue whatever the cause is not an issue. No abolute good, bad, rights, wrongs here as is usually the case. If nf scares you do not buy products that use it. But if you have good ears you trust i would not let anybody scare yiu away from what sounds good based on limited theoretical arguments.
Negative feedback Amp=more faithful reproduction?
Negative feedback (NFB) vs zero negative feedback (ZNFB). There seems to be unsubstantiated contention that ZNFB amps sound more realistic. I know this is an age old debate favoring the ZNFB design, but I think most audiophiles have never bothered to look into this matter and believe the advertisements and proponents of zero NFB design. I have been in that camp until recently. My own experience and research into articles on this matter leads to me believe NFB is needed for faithful reproduction of music. I'm not saying NFB design is more "musical", which is a highly subjective term and usually means more euphonic or colored. I've posted a similar question awhile back, but I was hoping we can have a more evidence based discussion on this matter. Perhaps, we need clarification of descriptive terms we use to describe sound. My contention is, in general, NFB designs produces a more accurate or faithful reproduction of music than ZNFB designs. Here is a very good article on feedback and distortion:
http://sound.westhost.com/articles/distortion+fb.htm
http://sound.westhost.com/articles/distortion+fb.htm