I just installed my speakers, deck, amp and sub. Turn it all on and hear the dreaded whine from the speakers. Increased with gas pedal so I'm thinking alternator whine.Here are the things I tried already:
Unplug rca's from amp =no whine
pull deck
unplug antenna= whine
pull rca's from deck=no whine
I tried measuring a bunch of stuff but I'm new to audio so I don't know if any of the numbers matter. I measured from frame to deck ground wire~0.1ohm
amp ground terminal to frame~0.1ohm.
amp ground terminal to deck ground~0.1ohm
After I put the deck back in I noticed the whine had also picked up a little static so obviously I changed something while messing around.
Also when I put the fan on high it while increase the whine.
Any suggestions?

 

go over all the -neg- with sandpaper and do the big 3

 

Post all the items installed.

 

Okay, items installed,
TS-SW1201S4 Premier® 12" Shallow-Mount Subwoofer
TS-C720PRS Premier® 6-3/4" PRS Component Speaker Package
DEH-P510UB Premier™ CD Receiver
amp is a crossfire xp6004 running components off two channels and other two bridged to the sub. Wired with 4g power and ground.
Also I'm wondering for a temp ground for the amp would it be acceptable to use jumper cables from amp wire direct to frame and se if that makes a difference or is that asking for trouble?

 

99.99% chance that it is the cd player. Pioneer has a known issue with the design of the circuit in the preamp section. You have taken out a small internal fuse on one of the ground traces in the head unit. Take the head unit out of the dash and use a small piece of wire and touch one end to the case of the cd player and the other end to the shield of one of the rca cables where it attaches to the deck. If that solves the problem then you do indeed have a issue with the cd player.

 

Thanks. I've been reading a bit online about the earth tracks being issues in other models. I was really hoping mine wasn't gonna be one. Does it matter if I do both rca's or which one? I never had a chance to get out there today but that was on the list of things to try. I've tried that measurement with an ohm meter and read ~0.1 ohms and heard that if you have continuity to the chassis that means the ground tracks should be good but you never know and it's an easy test to cross another thing off the list.

 

It is a problem inherent to all Pioneer models in the last 20 years at least from my personal experience. You will only need to do one of the lines.

 

very ture.. i had the same prob a while back and it drove me nuts. the ground to rca's really helped a lot

 

I experienced a similar problem. In the end we discovered the whine was created by the sub woofer amplifier which was being powered by uneven signal from the battery, from the alternator. A capacitor was installed at the front of the vehicle, between the alternator and the battery, smoothing the signal traveling from the alternator, to the battery, to the amplifiers. The whine was audibly eliminated!

 

When any device within your car requires power it will pull current from the battery which will pull current from the alternator. This is why the whine worsens with fans, music and gas.