Originally Posted by
philwsailz
Hey 'Goose-
A few questions for ya:
1. DId you use the power wiring that was there already, (200.4) or did you install new 4ga wire for the 700.5?
2. Where is your head unit power wiring connected?
I ask these two questions first since the noise you are getting is associated with a voltage potential difference between the head unit and the amp. Using the too-small stock power wiring can cause this. Additionally, we want to take steps to make sure the head unit is at the same voltage potential as the amp. This often gives us the opportunity to try the very simple re-wire job that David already pointed out, specifically taking your three head unit power wires and connecting them directly to the amp:
Your yellow power wire goes straight to the amp's B+ terminal. Your red power wire also goes to the amp's B+ terminal, but through a switch o relay of some sort that will allow the stereo to be turned on and off. Finally the radio's black power wire goes to the amplifiers negative terminal.
90% of the time, this simple head unit re-wire will remove the4 whine and noise you describe.
The fix will be easy, but you need to take a systematic approach. One thing at a time.... Replacing the RCA cables might do the trick, so don;t rule that out. But, check your power wiring first, then move down the chain, checkign things one step at a time. It can be intimidating for the average Joe, kind like looking under the hood of a car, but it really is very simple and straaight-forward.
Let us know!
Phil
Kicker