I have 2 amps in my trunk. One for the sub, the other for the 6 speakers that I have. I have isolated the noise cause by the sub. Is it grounding problem or amp problem ?
Thanks,
Joe
it could be one or the other or both. if you have cheap amps, the noise can be introduced through them. if the amps are from well known companies, then it’s probably your ground. check to see if it’s making good contact with the chasis. if it is and still making the noise, try relocating the ground point. and make sure both amps are grounded at the same point.
thank you!
do you have a gound loop isolator? they work wonders and are only like $10 at radio shack. i can get you a pic if you need, they are rca style cables that eliminate ground noise. i was having the same problems once.
chris
Just FYI: Ground Loop Isolators are merely inline filters that take a chunk of the signal out of the line… they do not actually make the ground noise magically dissappear… they simply remove the band of frequencies the noise lies within… meaning you lose signal which often CAN be heard through most speakers (although, not subs…)
What I’d recommend is to swap RCA’s with some known good ones, just to check. Run them down the center of your car (don’t hide them or anything)… just to see if there is maybe something up with the RCA’s you currently have running down the side of your car. Also, make sure the plugs un your amp AND on the RCA’s and HU are intact and functioning properly… not bent, scratched, etc… this can cause ground loops.
Also, do as others have suggested, and check your ground again. Try grounding your two amps (I assume you have two amps?) in the SAME spot, to the same bolt. This helps 75% of ground loop problems in multi-amp systems.
If none of the above solutions work, try running your HU ground wire to the back where the amps are grounded (have all grounds terminated at the same spot)… but when doing this, use at least 14 guage wire for the HU ground (since it’s a 10’ run).
If you have any other Q’s, let me know.
~Eric
Check your RCA’s. Are they run on the opposite side of your car? If so they shouldnt be a problem unless when reaching your hatch they go parralel together. To ensure absolute noise suppression, you can go at 90 degree crossing. That would reduce the sound. If its not that, its your ground, check it. Strip the paint off a spot, get a good soldered connection.
you have to run the rca’s and the power wire on opposite sides of the car or you will get that humming sound. hth
ground the wire in the middle of the rca jacks thats what its their for. its just interference in the rca’s. you can wrap your rca’s around the power wire if you want as long as that wire is grounded it will not interfere.
Originally posted by NTegRacer91
you have to run the rca’s and the power wire on opposite sides of the car or you will get that humming sound. hth
Actually that’s an audio myth. I am an installer, and we always run our power wire and RCA’s together. We NEVER get noise. 95% of the time noise is caused by a bad ground. I always use a ring terminal on the ground wire, use a grinder to grind away all the paint, and use a self tapping screw to attatch to the vehicles body. I also recomend using a star washer just to make sure. Also make sure you use a large enough ground wire.