I just installed a 4 channel amp, component speakers, and sub woofer in my car. Sounds great, but I'm getting an awful alternator whine upon acceleration and decel.

Here's my set up:

- Aftermarket HU, Pioneer MVH-P8200BT.
- My amp is placed in my spare tire compartment. It's a 2009 Kenwood. I can't recall the model # at the moment.
- My Sub is in my trunk. MB Quart Shallow mount sub woofer. Can't recall model # either.
- My new speakers just replaced the stock speakers. These came with tweeters. (Drilled holes in my door panel and flush mounted them there. These tweeters did not come with a separate crossover, they actually attach to the back of the speaker. Alpine Type-S SPS-610C)

Speakers and sub are using 18 gauge speaker wires. Everything is powered by the amp.

I have routed the door speaker wires from the back of the HU through the middle shifter area, to the back of the passenger seat, into the spare tire compartment. The sub woofer RCA and the 12v blue amp "turn on" wire are also routed the same way.

The amp power wire runs from the battery through a grommet on the passenger side firewall, goes under the door sill, back of the passenger seat, and into the spare tire compartment. The speakers RCA also is routed this way.

The amp is grounded to a bolt that is above the spare tire compartment. The black ground wire for the HU's connector is just spliced with the black wire that was on the harness.

I've read that RCA's can get interference with the Amp power wire, but I also read that it was a myth and the number one cause of this is bad grounding. Where's the best ground? Should I ground the HU to the car metal or just leave it?

I don't mind rerouting wires. Could someone give me the best way to wire that will take away the whine? The only wire i'd like not to move is the amp power wire. I'd also like to keep the amp in the spare tire compartment.

 

I hope this helps....
http://www.crutchfield.com/S-1u6DbEh...ech/kb348.html

Typically, HU ground is 'optional' if you want to ground through the factory harness or bolt it to a bare metal area. I use a Alpine CDA9887 and run it through a modifry harness which is connected through the factory harness.

The RCA, signal, and speaker wires(could be down the middle or under the floor carpet) should be running on the passenger side and power on the driver side.

As for the Amplifier ground, most common place to ground is on the crossbar bolt on the bottom(sanding the surface down with sand paper). "OR" you need to make a 'common ground' point somewhere so there's no drop in power.

 

I think your problem is that you are running the speaker RCA cables along with the amp power cable on the passenger side. Leave the power cable there, but run the speaker RCA's down the middle of the car with the subwoofer RCA's.

 

I agree with unison21 run RCA's down the center console away from the power cable.

I have my power run on the driver side and RCA, speaker wire down passenger side and no problems.

 

try touching a ground to outer metal on rca's behind radio. if it goes away search about pioneers gound issues.... this is it 99% time on pioneers

 

found this


http://caraudioforum.com/showthread.php?t=297235

 

I've done HUNDREDS of system installs. 99 times out of 100 the whine is caused by cheap crap RCAs. Yes, technically, whine is caused by the electromagnetic field generated by vehicle wiring, however, it is very minor, and a good set of RCAs will be immune to it. Just to give you an example, my RCA wires are run TOUCHING my 4 gauge power wire the whole length of the car (from the pass. footwell into the trunk) and I have absolutely no noise. Others have it run down the center console, where there is no wiring at all, and their system still whines. Remember, no matter how far you put the RCAs and power in the car, they meet at the amp, often within inches of each other. Here are the RCAs I have....

http://www.knukonceptz.com/productMa...20RCA%20Kables