Whining sound from mids

[Machelski65]

First off here is my setup:
-Pioneer Premier DEH-P760MP Head unit
-5.25 Kenwoods in Doors, 6.5 Pioneer Premiers in rear
-2 Hifonics ZS12 12 inch subs
-Rockford Fosgate 501BD Sub Amp
-Alpine V-Power 360 4 chan. Mids Amp
-4 GA. pwr wire to distro block under seat and 8 GA from there to amps.
-8 GA ground wire from bare metal surface of rear seat hinge.
-MONSTER RCA's
-Ground loop isolators 3 of them( 1 each pair of rca's)
THE PROBLEM:
Get a whine out of my mids, gets louder as rpms increase. I do not get the whine when car is not running.. Any ideas, I have been trying many things no luck.. Was hopeing someone here has had the same experience.. From reading I have seen people say rca cables bad or ground bad. My ground is good, is there a way to test RCA's to make sure good? Thanks for the help in advance... A.J.

<small>[ December 02, 2004, 09:55 PM: Message edited by: Machelski65 ]</small>

[n_o_s_21]

Check your ground loop isolaters. could be faulty. also scroll back in this section, there was several other options mentioned a couple of months ago. called "bad ground" or "ground problem" or something like that

[Machelski65]

Thanks NOS, read up on all of them I could find last night. Then I posted this because I have tried all of those things.. Thought someone else had tried what I had , and found the problem... Anyone? Gonna mess with it some more this weekend. Will let yas know.. Any way to test RCA cables to see if they are bad? Thanks A.J.

[2fazed]

I would use 4 gauge ground wire instead of 8. I use the rca plug in ground loops from Radio Shack, and they work really good.

[Typhoonk]

Before you try going nuts trying to find out if you have a bad ground or if one wire is too close to another. I suggest getting another cd player and trying it. Could be a bad RCA source.

[TekPmp]

Did you run the signal wires on the same side as the power wires?

[Rope04]

if your rca's are running on the SAME side as your power wire then it will wine with the revs of your alternator.If your rca's have an aluminum foil type sleeve around then inside the wire then it won't or shouldn't. run your power and rca's on opposite sides of the carand it will eliminate the problem...It has to be that you sure enough ran them together.

[Dave-UK-MX3-V6-SE]

I'm having the exact same problem, the RCA and power cables are running down opposite sides of the car, the ground is good, and I'm using 4 guage cables for power and ground.

Pioneer DEH-P9600MP.

Not cool!

[nope-mx3]

Also, check if the gain on the amplifier is adjusted too high.
Often this is the problem, else it`s probably bad grounding.

nope-mx3

[Aaron MacDougall]

First of all get rid of those god aful loop isolators. They are nothing more than a bandaide and are only for people who are too lazy to properly set up a system. Check your wires and double check them. HU and amp grounds. Check the connections on your speakers and check the gains on your amps. If possible like said try another HU to see if the problem persists and also maybe try another amp to see if that is inducing the noise.

From my experience isolators have no place in a proper installation.