2. amps-preamps
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What is wrong with negative feedback?

I am not talking about the kind you get as a flaky seller, but as used in amplifier design. It just seems to me that a lot of amp designs advertise "zero negative feedback" as a selling point.

As I understand, NFB is a loop taken from the amplifier output and fed back into the input to keep the amp stable. This sounds like it should be a good thing. So what are the negative trade-offs involved, if any?
solman989

Showing 6 responses by rleff

rleff
1,065 posts
 
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.
rleff
1,065 posts
 
Ralph is there a relationship that exists between negative feedback and damping in relation to how the amp(s) react to the what a speaker reflects back to the amp? So when you see a amp with high damping specs it means a large amount of feedback is being used;would that be right or wrong?
rleff
1,065 posts
 
Kirkus you know who Atmasphere is right?
rleff
1,065 posts
 
Thanks Ralph good information.
rleff
1,065 posts
 
Hard to disagree with Ralph's last post in my opinion.
rleff
1,065 posts
 
Jamesgarvin I had a pair of Manley ref 440/200 monos that had adjustable slopes and feedback to custom taylor the sound;there were noticable differences but I did not consider it annoying just different.
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