Amp/Preamp Asylum

Vintage Mac unity coupled consumer tube amps

70.136.71.124

Steve O

A

In Reply to: RE: Hmm, best sounding class B is McIntosh; unity coupled circuit IS brilliant, however-nT posted by Cleantimestream on February 11, 2025 at 07:47:47

Are really AB in that they operate with significant idle bias current thru the finals. Theory indicates that a unity coupled OPT could operate successfully with B biased finals but that's not what Mac did in practice, at least for their consumer stuff.

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