Question about Polk Audio PSW150 Speaker

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My subwoofer atarted making deep humming sound,

My subwoofer atarted making deep humming sound then stopped working. I changed the fuse and then when i turned it on it blew the fuse. What can i do?

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Some kind of semi-conductor in either the power supply section or the main amp has failed and acting like a piece of wire, which is why the fuse is blowing. You might want to look around for damage or burning. If it's a transistor or diode that has gone an Ohm Meter will show it up well. For when you put the test probes on the terminals of the suspect part, it will be like you had touched the probes together!

Posted on May 11, 2010

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