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RE: Actually...

Posted by Mister Pig on May 3, 2022 at 09:19:48:
This is from the First Watt website.
"The F7 is a very unique power amplifier, a two-stage push-pull JFET/MOSFET
topology with fewer parts than any First Watt amplifier to date and incorporating
a very interesting balance of very low negative voltage feedback and a little bit of
positive current feedback to give an astonishing measure of control over reactive
loudspeaker loads."
There are different implementtions of Class A. I typically think of it as having the output transistors amplify the whole waveform and never turning off.
This is a push pull amplifier, so the transistor is not amplifying the whole wave form. Now the transistor may stay on during the entire waveform and not amplify the signal and can still be considered Class A. But it not what I typically think of a Class A amp....and to me the F7 is a push pull amp and not what fits the definition of Class A
"The Class A amplifier is the simplest form of power amplifier that uses a single switching transistor in the standard common emitter circuit configuration as seen previously to produce an inverted output. The transistor is always biased "ON" so that it conducts during one complete cycle of the input signal waveform producing minimum distortion and maximum amplitude of the output signal."
The F7 does not meet this criteria since it does not conduct one complete cycle of the waveform.