Question about Precision Camera Precision Audio 12-inch 1000-watt Subwoofer Car Speaker

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12 inch subs emit engine noise

I installed twin sony 12inch subs in the back of my 1986 ford laser
with a dub mono block amp set up to a jvc headunit with audio line wireing kit. with the engine off it works just fine but when i turn the engine on i get the engine noise coming out of the 12inch subs. i have power runing down battery side of car and rca's on the other side i have fiddled with the amp settings and nothings worked can you please help me

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Try using a shorter ground u want to be grounded within 12 inches from amp also rca may need ground picking up engine noise

Posted on Jan 31, 2015

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You will have to go buy noise filters for the headunit. This will stop engine noise

Posted on Jan 31, 2009

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1 Answer

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1 Answer

Wierd problem with my subwoofers please help


It sounds like your RCAs are pickin up noise somewhere, are your rca cables next to your amp power wire? this could be the problem. Just recheck your signal wires and make sure they aren't close to any significant power cables. Also does the noise only come from your subs or your car speakers to? If it comes from all your speakers you may have a headunit problem... hope this helps

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1 Answer

I have a JL Audio 12 ich subwoofer rated at 8 ohms. also a mono block insignea amplifier at one ohm stable 1-4 ohms. how to i wire it safley? possible?"


Your amp based on what you say would have no problems whatsoever with an 8 ohm load, not even if it actually has dual 4 ohm coils and you wire them in parallel giving a 2 ohm load (don't know your particular sub).

Every good car amp has protection circuits to prevent itself or the speakers from damage from too low loads so it shouldn't be a problem even if you screw up with your calculations. A good amp should even be capable of dealing with a dead short on a channel, zero ohms, activating protection of course.

Good luck and don't worry!

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