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I have purchased a second hand amplifier which was playing correctly with the previous owner. When i installed it in my car i have a constant noise in the background which increase when i accelerate. Also, when i start my car the amplifier does not play. After some time it starts playing by itself.

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There is an issue in your power connections in regard to the amp kicking on randomly check all the negative and positive lines from your amp to the battery and verify you havent blown the inline fuse...as for the noise, pickup a ground loop isolator..you can buy them at walmart or any other store with a car audio section...normally this will address the issue, also you may want to move your contact point for the ground to another location and ensure the cable isnt more then 3-4 ft long as this could be the cause of all your issues...if the ground isnt making adequate contact to the metal then the amp will go into protection mode *boom* you hit a bump the connection is made a little better and now your amp has completed the circuit and will begin to work properly however since it is a weak connection you will get the whining noise in your speakers as you accelerate or a click each time you hit the break...move the ground first and foremost

Posted on Jan 10, 2011

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Posted on Jan 02, 2017

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