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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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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Posted on Jan 02, 2017

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It would be helpful to know if this is a new problem on working equipment or a new problem on NEW equipment. And if you've flipped through the manual without success.

Of course you KNOW the sub must have its own amp, right?

First, you need to determine if the Onkyo or the unnamed sub is at fault.

Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Onkyo-TX-SR608-Receivers-manual/id/23653ag916/t/2/

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Don't buy into the hype that there are different pedigrees of RCA (or speaker) cables that will make an audible difference. Save your money.

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