Question about Alpine MRD-M1000 Car Audio Amplifier
When the back speakers are connected to the amp i get a hissing noise through the speakers (sounds like the rmp) i rev the car and it gets louder but when i put the speakers back through the head unit it doesnt have the noise and sounds normal
I had this problem, you could hear my engine it wasn't my subs or amp, it was my deck, I replaced my pioneer deck and it solved my problem.
Posted on Feb 12, 2010
If the subs are making a humming or RPM sound check your ground on the amp , make sure its a good ground. Always run your power wire from battery by itself down one side of vehicle. Groun should be no longer than 2 feet. If that dont help you can buy a noise supresor that goes inbetween your head unit and amp through RCA's with a ground on it . Hope this helps.
Posted on Jul 30, 2009
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Posted on Jan 02, 2017
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