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Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

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You will need an electronc multimeter

Posted by Benoit on March 17, 2003 at 01:28:35:
and the cheapests are digital...
You are looking for voltages in the range 10-500 mV (a thousand of a volt).
Switch on the amp. Disconnect speakers. Switch on amp. Set meter on DCV range. Connect meter in speaker output (polarity don't matter).
Read results (wait for amp to warm-up before final reading).
A few hundreds millivolts is tolerable, more is not. If you can adjust, target should be less then 50mV.