I built a pair of Graham Maynard's class A amps.from the Electronics World articles,then upgraded them to the GEM 25W.The sound quality was greatly improved,possibly due to the feed back resistors being reduced by a factor of 10 ( 10K/470R to 1K/39R),this gave a much "tighter" sound.
Without sounding too syncophantic,I think this is the best amp.I have built to date.My first being a Tobey-Dinsdale.
Many thanks,Graham,for an excellent design.
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