Quote:
Originally Posted by etherman
Despite some health issues, my attention is back to the amplifier. On listening, the first (built) channel is louder than the newer one. This is easy to confirm by ear.
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When you say louder, do you mean greater maximum loudness (which could indeed be affected by the DC operating conditions) or louder output for the same input? The latter would imply different gain, suggesting some inadvertently different component values in the feedback system.