Edwyun, Yes, we have to realize that when they talk about zero feedback they mean global feedback. Amplifier can have many local feedbacks and they might still call it ZNFB. Why? Because ZNFB became catch phrase and sells amplifiers.
You stated the you would buy amplifier with zero output impedance, infinite bandwidth zero distortions etc. but I'm not sure everybody would. Some people would complain that it doesn't have good bass with their speakers (zero output impedance), others would call sound analytical and sterile (lack of distortion and zero noise) while some would call it bright (infinite bandwidth) since their system has tendency for it. In addition many people like warm sound (enhanced even harmonics) and would not be happy with this amplifier.
Shallow global feedback, properly used, can reduce distortions, widen bandwidth and lower output impedance WITHOUT introducing Transient Intermodulation.
As for getting rid of the equipment, I think you're right. For the money some people constantly spend on audio they could hire Symphony Orchestra to play for them.
You stated the you would buy amplifier with zero output impedance, infinite bandwidth zero distortions etc. but I'm not sure everybody would. Some people would complain that it doesn't have good bass with their speakers (zero output impedance), others would call sound analytical and sterile (lack of distortion and zero noise) while some would call it bright (infinite bandwidth) since their system has tendency for it. In addition many people like warm sound (enhanced even harmonics) and would not be happy with this amplifier.
Shallow global feedback, properly used, can reduce distortions, widen bandwidth and lower output impedance WITHOUT introducing Transient Intermodulation.
As for getting rid of the equipment, I think you're right. For the money some people constantly spend on audio they could hire Symphony Orchestra to play for them.