Grounding Noise

[jrwalte 10+ year member]

I seem to have a grounding issue. With the engine on or off, I'm getting noise over my fronts only when I connect my sub amp. I have no noise when only the front amp is wired.

I have a kicker dist block taking 2 4 AWG from the amps to a 0 AWG grounded with a Streetwire grounding block. I sanded the grounding area with a dremel and it is located in the wheel well centered behind the seats.

My thoughts on fixing the grounding issue was to bypass the dist block and ground the amps seperately with their 4 AWG. I was going to buy another grounding block and place them on opposite sides of the trunk.

Do you think this will most likely solve the issue? Or are their other things I can try first?

Thanks.

Amps:

Pheonix Gold Ryval v8001

Eclipse EA4100

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[jrwalte 10+ year member]

Could a kicker dist block for my grounding allow noise to get on the grounding wires? Or does it have to be RCA issues or master (0 AWG) ground to trunk chassis?

Or could installing a XM direct to HU cause the noise? I believe the antenna wire is running along the same side as my RCAs to the trunk.

 

[jrwalte 10+ year member]

I believe I've narrowed it down to the RCAs causing the issue.

I have the Monster 300 series for the fronts and 400 series for the sub. They both carry noise which goes away when I disconnect them from the amp. I also get no noise when I connect a speaker directly to the HU, which would make me think the HU ground is OK.

I'm going to try grounding the RCAs to the HU.

 

[jrwalte 10+ year member]

This sucks. Nothing worked. Not even grounding the RCAs at the head unit. It helped and it lowered the noise, but it also lowered the sensitivity of my RCAs and the audio quality sucked and sometimes a channel would get louder/softer. I'm thinking the grounding inside the HU is damaged - someone here called it the PICO chip?

No way in hell I should be going through this crap with a high end unit, DEH-P800PRS. The thing is encased entirely in copper too. I've called my insurance company that had replaced my 880PRS to get a new one sent. Now I'm without a HU for another couple weeks!