CODA Technologies amplifiers use no global feedback. The company was founded by former employees of Nelson Pass in his Threshold days.
Unsound's suggestion of some of the older Threshold amps may be a good way of obtaining a no global feedback amp at a modest price.
NGJockey makes a good point about the complementary benefits of differentially balanced design, but of course a quality zero feedback fully balanced design will not be inexpensive. Ayre is a good example.
Also, I've seen the Clayton Audio amps, which apparently are outstanding, described as using virtually no feedback. However they are Class A and therefore don't meet the criteria you listed.
Best regards,
-- Al
Unsound's suggestion of some of the older Threshold amps may be a good way of obtaining a no global feedback amp at a modest price.
NGJockey makes a good point about the complementary benefits of differentially balanced design, but of course a quality zero feedback fully balanced design will not be inexpensive. Ayre is a good example.
Also, I've seen the Clayton Audio amps, which apparently are outstanding, described as using virtually no feedback. However they are Class A and therefore don't meet the criteria you listed.
Best regards,
-- Al