noises, amps and factory head unit

Has anyone had a problem before with installing Pac Audio C2A-CHY with the factory head unit? I have some noises not sure where it is coming from, it is not channging when I push the gas pedal, there are 2 pairs of RCA channels coming out from Pac Audio (front + rear) and I used Y splitters for the rear ones so I could get 2 pairs of rear and I connected a pair to 4ch amp and a pair to mono amp, and then a pair for front to the 4ch amp, is this the right thing to do? I tried to unplug the Y splitters and plug back in, the noises are still there. Is the RCA connections supposed to be wrapped with black tape?, Is it possible the noises coming from the Pac audio or the HU? I tried to change the ground for the amps, but the noises are still there even when I put the volume to 0.

i dont think it is the HU because it is factory. id point the finger at the amps since the noise is still there even when you disconnect the RCAs from the amps. what are the amps you are using? and what size power and ground are you using? and are you using anything else like a signal processor?

-------------

I am using Rockford fosgate P4004(4channel) and Alpine MRP-M1000 for the mono amp. I am using 4 Gauge power wire and ground and I don't use signal processor, so from HU-->PacAudio(RCA)-->Ysplitters-->amp-->distribution block-->battery

yeah im almost certain it is one of your amps. make sure you have them both on a good ground to bare metal(scrape the paint off) and make sure none of the rcas are touching each other or anything else that is metalic, tape them up if you have to. also you can try disconnecting the speakers from the amp one by one to see if that changes anything and if nothing changes all you can do is try a new amp or take it back to where you got it and have them check it out

-------------

I tried with the new blaupunkt PCA460, still got the noises, I changed the ground connection to directly to negative battery connector, still got the same noises, I moved the PAC AUDIO to the passenger side still got the same thing. I disable the alpine amp to limit the connection only for 4 ch still got the noises. The noises are still there even I did not start the car. Tried to unplug speaker wires one by one, nothing changed, I am curious if this is coming from Pac Audio, I will ask their tech support. But the dash speakers which are connected to the factory amp speaker work fine without noises(these are connected through the factory harnesses to the factory amp).