Need help with buzz

[blueper]

Just finished a whole new install in my 97 V6 Mustang vert.
Ripped out all the speakers, amps, head unit and cd player.
Replaced with Kappa speakers, Kenwood head unit and 2 amps.
All RCA's were ran on the passenger side and power on the drivers.
Shortest possible ground on the amps (4 ga power and grounds).

My wife noticed it before I did.
There is a buzz from the rear speakers when I'm at low volume.
Isolating further, I have noticed when the radio is OFF, I still get the buzz.
Have not noticed buzz from the fronts.
The radio provides the remote for the amps, so I know the amps are not on.
I think my next step is to disconnect the rear speakers and see if the buzz is still there.
I have heard alternator whine and this is not it.

Any help will be appreciated.

 

[2BADSTANGS]

How is the system setup? 1 amp for front, 1 for rear? Did you have a mach system or standard? Are your 2 new amps the same model?

 

[blueper]

Infinity reference 475A 4ch for the front and rears.
I had the Mach 460. All of it ripped out.
The sub amp is a Profile ap1000m mono.

 

[2BADSTANGS]

Is the amp power light staying on when the deck is turned off? If you unplug the rca's from the amp does the buzz stop?

 

[blueper]

No, the amp lights are off.
Yes, The buzz stops when I unplug the RCA's at the input to the amp.
There is no buzz on the front speakers even when I swap the front and rears.

I'm starting to think there maybe an issue with the rear output of the amp.
Tomorrow I will swap the output of the amp and see if the buzz is in the fronts.
Am I making sense???

 

[2BADSTANGS]

You are making perfect sense, that's why I was askin' all the questions, to eliminate components... You did bypass the amps under the rear deck right? ( It sounds like you did.) Let us know what you find.

 

[blueper]

I did not bypass because I ripped all 3 amp out.
I bought the amps from crutchfield, I'll give them a call if I find the amp is having an issue.
They're really good about swapping out components if they're faulty.

 

[2BADSTANGS]

U can swap the front wires to the rears (at the amp) and if the front speakers start experiancing the same problem, good chanse it's the amp. Keep us posted!