Quote:
Originally Posted by audio bill
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.
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Most McIntosh amps operate in class A mode for first ~ 8 -12 watts. As you say, other manufacturers will differ, e.g., Parasound ~ 5 -7 watts.