Negative Feedback a deal killer?


If an amp employees negative feedback is that a deal killer to you. I have had both zero negative feedback and 5db nfb amps and I much prefer the Zero's. I am looking at a Unison 845 amp and it has over 10db nfb. Or should one just listen and shut up.
Your thoughts are appreciated.
Mike
brm1
"...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
H2O, welcome. A friendly note: the expected courtesy here is for those that are in the "business" regardless of how small an enterprise it may be, proclaim that each time they post. This is especially true if they're listed as a "private user".