Bias adjustment on solid state amplifiers

The main reason to increase the bias of a SS amp is to reduce crossover (i.e. notch) distortion, but it is not really something a consumer should do, and the benefits are rarely worth the risk to the transistors and power supply.

Where exactly to set the bias point for a given transistor is a matter of some art. Enough to eliminate gross distortion but not enough to warm the room.

Best,

E

This adjustment is simple.  Find the values.  

I can bias mine. If I read right (and I could be mistaken) but the bias pots would set how much my amp runs in class A vs A/B.

SS bias need not ever (almost ever) be adjusted if no rail caps or output devices are replaced during the normal lifespan of an amplifier, or if there is no trim pot drift/failure.

Once upon a time you would find the bias procedure and values in the owner’s manual but today almost everything comes with a warranty and/or the manufacturer’s lawyers advise "No User Serviceable Parts Inside".