Ewww, ground noise finally isolated, now wut!?
Well, I finally got a new head unit to tide me over until the carputer money starts rolling in. My last one was 8yrs and counting, still works...on ebay as we speak...anyway...
I have always had a little bit of static, in the past months, which I narrowed down to the RCA wires that stuck out from the back of the HU itself, jiggle em and static would "jiggle" too. And most recently when I installed new components in the rear, I got engine whine.
So I figured why not just change out the ol girl. And I did.
Engine whine still there.
Disconnected RCAs from amp (5 channel amp running all interior speakers) and still engine whine. So that narrows it down to the amp alone.
Its a Rockford Fosgate 600.5, sweet amp. The +/- are 4G wire, and the ground is connected with a gold plated square donut end thru a bolt that goes to the chassis holding the back seat bench down. It was a ***** to ratchet on and off.
So since its narrowed down to the amp, is it most positively a grounding problem?
Is it that what I thought would suffice (the bolt itself, because i did NOT scrape any paint, but the car is silver so I might have thought it was bare, i mean its under the seat, but a coating is a coating) is not good enough and I should unbolt it, scrape the paint and try again?
I have had this setup (sans the new HU and rear components) for 4 yrs now. And I think maybe I have had this all along, but didnt notice. The rear speakers were powered by the HU, and the fronts (components) were off the amp. Now with rear components, the front and back are run by the amp, and nothing by the HU. So with my whole sound field with the ground noise problem, I notice it now...or its a possibility.
I just dont want to have to ratchet that ***** again, ill have photos to show you how and why. :nutz:
Now with 100% MORE PHOTOS!
Well here you can see where the ground is attached. To the bolt holding the back seat down.
I thought the bolt, going thru a hole in the chassis, would carry the ground signal thru the chassis, to the bolt to my gold connection. And it DOES, because the amp is on, and works fine. Its the ground niose/engine whine thats the problem.
Does this connection look bad/good to anyone?
The amps wires might look "ugly" but they are a solid connection, usually that crap is hidden under the amps wings.