Booming won't stop

 I`ve got my own test bench.But as i said in my post I`ve changed amps already.

But when i did a search of the web I`ve found that people have had the same problem with the pioneer decks,

but no one has had a solution.That what promted my post

I also said in my post that this is not my first install.I`ve gone all the routes to eliminate noise,but it hasn`t helped.This is a strange problem to me,I`ve never heard of it before today.

the input gain,the noise just goes up and down with it.

as for the deck the speakers that I`m running off the output there work just fine.I`ve never seen preamp outputs go bad without the speaker outputs going out,but there is a first time for everything.

but i do have another deck that i`m going to try in the morning.

Does the HU have a gain control on it?  Or some sort of level control for the RCA outputs?

Preamps will go bad if the signal being fed to them is too great.  This would be caused by the gain being set too high. 

Does the same thing occur when you play CDs?

i see that happen at least three times a year...it sometimes also happens in the exact opposite...high levels bad but preouts good...i will say one thing though...even though it sounds like you have changed everything like three times over...after changing out the deck...assuming thats the problem which seems to be the case...make sure to check everything else one more time...although i have seen this happen quite a few times before...i have never seen it happen where there wasn't already something wrong with either

A) Amp

B) Subs

C) Wiring

D) Install

E) All of the above

not a personal attack...but it doesn't hurt to make sure