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I just got 2 amps installed. 1 ppi a600.2 and a arcaudio 1500-xxk. I have 1/0 gauge wire coming in as my main lead into a 1 farad cap which then becomes a distribution point to my amps. 1 8 gauge lead into the ppi amp and 1 8 gauge lead into the arc amp. Ever since the power was connected to the arc amp there has been this small amount of noise that is audible thru the tweeters upfront. Not a whine or hiss. Just a silent static noise that is noticable from when you go from volume 0 to 1 and is audible to about volume 5 but remains there. When i removed the power wire from the arc amp, this noise went away completely. The guy who installed this says its because the arc amp pulls alot of current but im like bullshit... First of all he didnt run 4 gauge to the arcamp like i wanted and ran the cap to both amps instead of just the arc amp which is for my sub.

Can anyone help me wire this the right way ? I have had so many problems with my system not being installed. Im thinking its a ground problem which causes the noise but he says he scraped off the paint and has it bolted under the rearseat where the seat connects to the chassis or whatever. Help?

What kind of HU do you have?

Pioneer Premier DEH-P860MP

So does this noise change with RPM?

Nope, NO whine. Sounds fine when i accelerate. Its like a audio noise when you go from volume 0 to 1 and its audible that there is a noise but not a whine. When i remove the power from the sub amp/arc audio, then this noise goes away completely. Its not a loud noise. Very small noise that isnt audible past volume 5 or 6 but enough to bother me or any audiophile.

thats a very good hu so i doubt its that but check and see if they grounded it serperatly. also check all our grounds and grounding to the seat bolt is a bad idea check that if so reground it to the floorpan.

Thanks man, i have a feeling its a ground problem. Im going to take it to a reputable shop around my way. Its just funny how the ppi a600.2 alone sounds fine but when the power is connected to the arc audio amp the little noise comes in.

Is it better to ground both amps and cap to 1 solid ground like the floorpan ? So total of 3 ground wires from 2 amps and cap to one ground point...

They should be grounded seperatly, not all in the same spot. But it could very well be the HU. Pioneers seem to introduce a lot of noise into systems, no matter how high up their line the HU is.

There is no noise when the ppi a600.2 is connected. It sounds amazing. When the arc audio amp was connected to the power, it then added noise thru the components.

Maybe its a ground problem. So should i have seperate grounds for each amp ? Whats the best way to wire this up?

Ok so the arc amp is for your cabin speakers then?

First thing is first, only run the cap to your subwoofer amp!!! Get that off your cabin amp right away! You are correct in how you wanted it, make the installer fix it.

Im going to wager the cap is playing games with your arc amp...