Ok so forgive me if this sounds stupid but our system is down at work so I have a lot of thinking time today. After installing my amp and speakers in my car I got a hissing/alternator kind of noise in my speakers, and I would hear a popping when various electronics in my car were turned on (rear defroster, seat heater, etc.) and a clicking from the turn signals in the speakers when I would signal. After replacing my RCAs to the back with this set http://www.knukonceptz.com/productDe...prodID=KRY2.6M I got rid of a lot of hiss however there still was some which I tracked down to being most likely the RCAs that I had soldered onto the factory head unit outputs (I used a fairly cheap set of RCAs to solder). Quick fix was to put in a ground loop isolator which got rid of most of the noise but there still is a slight hissing and sometimes pop when things come on. Iirc I think I read that good RCAs to solder on to the outputs have a ground wire built in to reduce the noise in the system. So as a thought I was wondering if anyone has tried these RCAs http://www.knukonceptz.com/productDe...rodID=eKo-RCA5 since there is a ground built into the cables and if it helps reduce the noise in the system. Again sorry if this sounds stupid but I figured might as well ask and see.

 

I wish I could help but I'm not familiar with that product.

I'm sure others will be along that are more familiar but in the meantime, have you checked the ground on your amp and are the RCAs and all signal wires run away from the power wires?

Did you tap in pre-factory amp or after the factory amp? Noise after the factory amp is pretty rare, noise before the factory amp is a little more common.

If you're picking up noise during the run from the HU to your amp, adding a line driver near the HU can help a little but I would use that as a last resort. I would start with the amp power and ground wires.

 

Thanks, so power wire runs down driver's side, rcas and speaker wire on passenger side. Ground is placed on metal on the drivers side with paint ground off. I had traced it to pretty much being the signal from the front after eliminating other possibilities. I tapped pre amp as I heard the factory amp was quite noisy but I could be wrong, so tapping post amp might help with the noise then? My amp can take speaker level inputs directly from the factory amp so this could be a good possibility to try out if this is the case.

 

I think you're on the right track tapping before the factory amp. The factory amp is dirty, anything past about 28 on the volume is noisy. You will always have some hiss no matter what you do.

On the other hand, pre-amp is more susceptible to noise interference since it's such a low level signal. It has the potential to be extremely clean all the way up to 40 on the volume but it's more temperamental; the install has to be just right but pre-amp is the way to go.

I'm not very good at troubleshooting noise because I've been very lucky but where I've found noise in my system in the past was where I tapped into the factory wiring with a bad connection. It gave me hiss, alternator whine, and ignition pop. I finally had to turn the system on with the volume down and jiggle the wiring to find it.

Adding a line driver once you're sure all connections are good can help. You're boosting the clean signal at the HU so any interference along the way will get amplified less at the amp. If it's a connection issue near the HU, you'll boost the noise as well.