Quote:
Originally Posted by Formerly YB-2
Please provide a source for your info. Believe your are incorrect. No McIntosh power amp I am aware of has the required "sliding bias" required to operate in Class A at any level, but I'm happy to be proved wrong.
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Class AB biased amps generally operate in Class A for some portion of their output depending upon their level of bias. For most AB designs the amount of Class A power is very small but with a higher level of bias current they can be designed to provide a higher level of Class A power. This does not require a sliding or tracking bias arrangement, but is just operating Class A within the limits of its fixed bias level. At higher power outputs such fixed bias amps operate in Class AB.