Question about Onkyo TX-SR502 Receiver

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Onkyo Subwoofer Pre Out Problem

Recently, my powered sub burned out when a blanket with static charge was tossed on top of it. Weird. What is worse: it burned out the output of my Onkyo SR502 subwoofer pre output. When I connect to it I get a loud, loud hum (using a different sub). Any ideas?

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Re: Onkyo Subwoofer Pre Out Problem

May not necessarily be the out put, discontect the sub from the receiver and see if it still makes a hum, Making sure that you turn auto on, off on the sub woffer.
If it still makes a hum, then you have a earthing problem, you can get a earth filter put on your internal wiring in your home, or you can remove the earth pin on your sub woffer

Posted on Dec 13, 2007

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Register and download the manual for free at

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