Negative Feedback a deal killer?

I have two sets of amps that use zero feed back (Atmasphere, Electra Print), one amp that uses minimal feedback (VAC), and another amp that uses moderate feedback (Music Reference). I use and love the sound of all of them in my system.

I suppose we might also clarify whether the discussion is about global feedback, local feedback, or both. While we're on the topic, when a company markets their product as a zero feedback design what are they really referring to? It's been my understanding that this generally refers to global feedback only. I had an interesting conversation with Roger Modjeski on this once. It's a topic you don't want to get him started on unless you have the time and knowledge to keep up with him.

It might be for me. Nfb seems to suck the life out of music.

Feed forward a deal reviver?

"...Negative feed back is just like anything else. It can help or it can hurt. It depends on implementation and how it is integrated with all other technical aspects of a design. "

Absolutely true !!!!!!!!!!!!

Still, I wish to add that NF is dangerous weapon and many nmanufacturers simply don;t know how to use it and it took decades to learn its positive and negative contributions to the sound.

My favorite amplifier and I own it, Spectron bases its design on "control theory" where they treat amplifier as a "control system". They do not use large amount of negative feedback but theirs - about 10 times faster then typical amplifier...and they can control speaker with the load of 0.1 Ohm...and reproduce music, particualrly dynamic peaks more realistically then any other amp I owned or auditioned. For hard rock - ain;t better.

Dob,

Please refrain from making bold statement like that. Please don't take it the wrong way but Spectron can not drive the 1 ohm Scintillas though tough load 0.8ohm from 20hz to about 2khz and then hovering around 1.5 ohm up 20khz. That is a tough load but still far cry from 0.1ohm. The Krell master reference is probably the only amplifier which can handle such load cause now we're so close to a dead short. Below is the real testimony that Spectron cannot drive 1ohm load, namely the Apogee Scintillas. Again, I meant no offense. Peace

http://www.apogeeacoustics.com/forum/viewtopic.php?f=5&t=41