Engine Noise

[93InfG20]

would that be the case even if the engine noise isnt there when the RCA's arent hooked in the head unit?

[frogg]

Could be. It's not that big of a deal to reground it and I'm pretty sure thats whats wrong.
Of course there would be no engine noise with the RCAs not hooked up.
How would you hear the engine noise if the speakers aren't hooked up?

[MoReace]

Wow, I've been wondering what that was. The noice gets louder as u accelerate and is awfully annoying. All you have to do is take the ground from the harness and reground it somewhere else? Where are some suggestions to ground it? Thanks

[MoReace]

BTW, I have no amp and subs. Just a new head unit (grounded in harness) and 4 Polk audio speakers. All original wiring. Still think it would be the same problem? Thanks

[Swonder67]

The stock system runs power wires all over the car for the Stock Amps. If they are still hooked up, then anywhere you run the RCA cables, (with exception to the roof), you will still get static. MoReace, the reason your speakers have electrical noise is because witrh your stock system, your head unit sent out an un amplified signal, so it could not get interfered with the power cables. your stock amps, (in the rear deck) then sent the amped signal to your speakers. when you got your aftermarkert head unit, you were then sending an amplified signal to the amps, which then amplified the signal again, making the noise much more noticeable. All stereos have that hissing, especially high powered systems

[A380Driver]

If you have an aftermarket headunit, and you are not using the pre-outs from that to go to the factory amps, then you need to get an in-line dB reducer to cut out some of the amped signal from the aftermarket headunit.

[Swonder67]

Originally posted by A380Driver
If you have an aftermarket headunit, and you are not using the pre-outs from that to go to the factory amps, then you need to get an in-line dB reducer to cut out some of the amped signal from the aftermarket headunit.

either that, or rewire the speakers entirely so you are only using the amped signal from just the head unit, not both stock amp and head. They do make a DB reducer harness that you can buy instead of the regular harness

[A380Driver]

If you have an aftermarket headunit, and you are not using the pre-outs from that to go to the factory amps, then you need to get an in-line dB reducer to cut out some of the amped signal from the aftermarket headunit.

[MoReace]

that will only reduce the noise, not eliminate it right? Would it affect the sound, I'd assume using the factory amps as well would provide better sound.

[93InfG20]

I get noise in my interior speakers and subs but only when my RCA's are connected to my amp and head unit....When you unplugg them from either end the noise goes away

[Swonder67]

Originally posted by MoReace
that will only reduce the noise, not eliminate it right? Would it affect the sound, I'd assume using the factory amps as well would provide better sound.

The inline decible reducer lowers the signal output from the head unit. This creates the affect that the headunit does not have an amp, therefore, the signal is only amplified from the stock amps, so you would get the same distortion you would get if your system were stock.

[Swonder67]

Originally posted by 93InfG20
I get noise in my interior speakers and subs but only when my RCA's are connected to my amp and head unit....When you unplugg them from either end the noise goes away

Your noise is cause because the RCA cables pick up an electrical signal from a wire running near them.

[93InfG20]

ok, I regrounded my head unit last night but the noise is still there. The RCA's aren't near any other wires either

[Swonder67]

No, the ground makes no diffrence. The factory wires for the stock amps run all over the place. Where did you run the RCA cables? tot he left, right, or middle?

[93InfG20]

The rca's are run down the middle...I have also had them on the right side before