Trouble from ground distribution block

Good call, forbidden

Another thing to try is taking a portable CD/MD/MP3 player and hooking it up to the amp and seeing if you still get noise. You probably won't, and if you don't, then I agree with forbidden. But even without that test, he's probably right.

Here are some suggestions to help with grounding problems.

-Make sure you picked a good ground point for the amp, obviously.

If you're still getting ground problems, you can always run an actual wire for ground instead of using the chassis, but you really shouldn't need to do this.

There's a ton of info about ground problems on this forum. Look around.

The easiest way would probably be getting a set of RCAs that have an extra wire on the end for ground.

But first things first. You did run the RCAs on the opposite side of the power cable, right?

When one piece of electronics has a bad ground it goes looking for a new one, usually down the shield of the rca cable where it grounds to another piece of electronics and looks for a good ground there. This is where the ground loop and difference in groud potentials comes into play. This is sometimes do to how the equipment is installed and quite often the type of equipment that is used. What makes an item inexpensive for example, how's about inadequate circuit design. This manifests itself as noise in a system and sometimes it is all about the vehicle that the equipment is mounted in. Why I aksed about a Pioneer is simple, they have a piss poor circuit design and are breeding ground for noise. Pioneer builds these cd players knowing full well that they are designed for the masses and not the few. The masses use them with no outboard amplifers thus noise is never an issue, the few use amplifiers and when coupled with other items of say questionable quality, a noise problem can develop in the blink of an eye.

1) what are the amps grounded to?

2) what was done to the ground wire under the hood?

3) can you ground the cd player to the amps?

4) do you have a meter or are you installing using "the force"?

forbidden... using "the force" is the only way to install! :D

I like that.