Humming sound to speakers from amplifier

Speakers make a humming sound once hooked up to amplifier even if radio is not on, the higher i put the gain up the louder it gets. once i turn the radio on i can hear the bass but the humming sound is still in the background and in between songs can someone help?

jose_rosas15 Mar 29, 2009

Thanx, heres the thing i hooked up a different amplifier and it worked perfectly fine which gives me a reason to believe that it is something within the amplifier itself but i can be wrong? Thanx in advance any help is appreciated

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655 Answers

Hello,

It sounds like you may have a ground loop issue. I'd start by checking all the power and ground connections. Then disconnect the RCA wires from the amplifier. If the hum goes away then you should try grounding the stereo to a better grounding point, the factory grounds are usually not very good at all. Then try it again, if it is still there try replacing the RCA"s.

If the hum is still there after you've redone the connections and replaced the RCA's, you may need to install a ground loop isolator.
Both www.crutchfield.com and www.sonicelectronix.com sell good ones.

Hope this helps

Posted on Mar 29, 2009

Anonymous Mar 29, 2009

Well, you are probably correct. The amp may be defective. When you tested, if you hooked up the different amp to all of the same connections, then the problem cannot be there, It's got to be in the amp itself.

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