I use a big ceramic resistor. Mine is a 10ohm 10w resistor. I touch it to the power cables that go to the amp from the power supply filter caps.
Another trick, is to wait a while, most amps have a build in bleed resistor that basically does just that, but can take a few minutes. Measure the dc voltage at the power supply to ground, for both the positive and negative sides of the power supply.
sent from Utah.
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