Negative Feedback a deal killer?

I haven't read every post in this thread, but has anyone mentioned GLOBAL vs single stage feedback?
global, from output to input while other designs apply feedback at a single stage or a stage-at-a-time.
I can understand the time dependent nature of feedback, but can't that be helped by more....limited applications?

Atmo / Kij,
Processing your replys now........and they agree generally with what I had heard, which is why I brought it up.
Talking about feedback without qualification doesn't help a lot.

I also have felt that the B&O 'd' offerings have more in common than differences, no matter WHO packages the modules and what mods are performed.

One question though, about 'd'. For at least the ASP modules from B&O, they come WITH integrated SMPS. How do you get around that? Go to another module...the ASC(?) series which has no PS included?

I've lost track of what B&O makes. Here is link to ASP module....I suspect as used in my PSAudio GCC series integrated::

The data sheet lists 50v and 80v outputs...with which to feed the extra, non power supply equipped modules. The 80v is listed as 7 amps, If I remember correctly. These numbers are with the 'home' amp having zero output....

http://www.icepower.bang-olufsen.com/files/solutions/icepower500aspdata.pdf

The GCC series is a so-called variable gain design. The input circuitry is handled thru something called a 'gain cell' which I HOPE takes care of any impedance mis-match with any source connected.
The balanced inputs from my CD player are wonderful....