If it happens with no input, probably a bad cap. Time for a service call.
Martin Logan EDL
I have an opportunity to purchase a pair of Martin Logan EDL speakers and Martin Logan subwoofer. The are fom 2009, but have not been used in past 5 years. When I plugged them in, one has a loud hum. Sounds to be coming from the bix with the woofer. Any ideas what would cause this, and if it can be fixed?
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