As an aside, many years ago I had LWE speakers, which provided negative feedback from the speakers back to the amp. The idea was to monitor the speakers response to the input signal and correct the differences by providing feedback to the amp. So, it was an attempt to correct the imperfections of the speaker, rather than those of the amp. As I understand it, the feedback was trying to do more of a long term, overall correction rather than a short time duration correction. I was never sure how much the feedback effected the sound, but I did like them paired with an old Dynaco SS integrated. People always asked why I have wires coming out of the top of the amp. Obviously, the idea never made the main stream, but the speakers were well reviewed at the time.
Why do audiophiles shun feedback in amplifiers?
I've owned several very highly regarded tube amps. Some of them allowed adjustment of the amount of negative feedback. I've always found some degree of feedback improved the sound...more realistic with tighter bass, dynamics, better defined imaging, etc. I have found amps with less or no feedback sound loose and diffuse with less dynamics... I know you should design am amp with excellent open loop gain before applying feedback. I can see the use of no negative feedback for low level amplification (eg, preamp and gain stage of CDP or DAC). So why this myth perpetuated by audiophiles and even many manufacturers?
- ...
- 69 posts total
- 69 posts total