Originally Posted by Dave06
yes Iam using a pioneer head unit DEH-P680MP
Pioneers have a know problem with grounding/noise/static/engine noise.
I have the 5700DVD and its terrible on the radio..I also have a PSD and all the alternator noise comes through my speakers...so I am forced to keep the gains way low on the amp..but not on the subs. A REALLY good source for problem solving your issues can be found at www.the12volt.com
lots of good threads there about noise with Pioneers.
Best of luck to you,
RollingRock, Keller Texas, 2006 F250 PSD King Ranch, Dark Copper.
Line-X with Xtra.