Question about Car Amplifiers

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Humming noise in amp

Engine noise in subs,tried 3 diff. areas for ground ,filter on rca and power wire
2 gauge cable with 800 watt pioneer mono one 800 watt dual voice coil
sub rival series.

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  • mdcustoms Oct 07, 2008

    2008 accord

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You must break it down through a process of eliminating items. With the system running unplug the RCAs from the amp. Do you still hear the noise? Try turning the gain down on the amp a bit and increasing the subwoofer level on the head unit instead. Make sure you have a low pass crossover set (probably below 80Hz).
Does the noise change with engine RPM?
Try a different RCA cable. I find that most times noise filters will make the problem worse not better. If none of the above things work, check that the grounds within the car are good, battery to frame, to engine block and chassis. Sometimes a bad vehicle ground is the cause. If all else fails, hook it up to someone else's system and see how it works.

Posted on Oct 07, 2008

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