i dont have any noise or feedback with the volume down all the way, but when i change songs, i hear a scratchy static thru the subs. i wouldnt be able to hear the subs if they were in the trunk, but they are where the back seats used to and the noise bothers me. the rca's and speaker wire are completely on the other side of the car and the grounds on the amps are excellent. the head unit is grounded to the frame and not through the harness. i think its just a pioneer head unit being gay. any suggestions?

 

Sounds like a bad RCA ground trace in the head unit. If at any point in time, the amps RCAs where connected to the head unit, and the amp had battery + connected without the amplifiers ground connected, it most often results in damaging the head units RCA (-) outputs. Why? the capacitors in the amplifiers power supply quickly charge when the amp is initially connected to 12V+ and ground, it will pull ground from anywhere it can, the RCAs in this case. This is why amplifiers give a healthy "spark" off the power leads when you connect it.

Easiest fix, solder a 14-16g ground wire to the RCAs outer shield or outer case, and ground it, this can be done at the head unit or the amp. This should solve your issue.

Kirk R

 

if that happened, it was before i had the head unit. i ALWAYS connect the ground wire first and rca's last. i really dont want to solder a ground wire onto my new kicker rca's . i guess i can just put the wire on there first and see if it solves it.

 

agreed, sounds like hu or rca's, i used to feel the same ways and go buy the nice rca's to try to prevent noise, i bought a nice pair of the Rockford rca's one time and with no pinch's etc they just went bad, even good stuff goes bad sometimes. if you have a test hu try it out ( you don't have to install it, just hook up the main power wires to a battery and plug the rca's into it.

 

I will have to disagree that it could be a burnt trace for the signal return, [RCA ground] that would result in no sound, I guess it may be possible that the traces were just damaged, but unlikely, they blow like a fuse if ground to the amp is lifted.
My guess is a problem with the HU, I run into more "noise" problems when connecting Pioneer HU to other then Pioneer amps then any other brands of HUs to any brand of amps, including Pioneer amps.

I would go with twentyhurtz suggestion and connect another HU to the amp temporarily to test if the Pioneer HU is the problem.
I would also try and ground the RCAs as KRock459 suggests, but do it as you say by just doing a temporary ground lead to it, if it is a trace problem, pull the HU and repair the damaged traces. 94

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by KRock459 &raquo;</TD></TR><TR><TD CLASS="quote">

Easiest fix, solder a 14-16g ground wire to the RCAs outer shield or outer case, and ground it, this can be done at the head unit or the amp. This should solve your issue.

Kirk R</TD></TR></TABLE>

that solved it. thanks bro