Interference..

[twhicher]

Hi All,

I've got an 07 plate GTI, with a full Alpine system. Headunit, amp for the speakers, sub driven by a second amp. It was professionally fitted by the previous owner.

It sounds great, but the issue is there is a constant high pitched whine, which varies with revs. It's clearly interference of some sort. Has anyone else come across this, and have any idea how to begin sorting it?

Cheers!

[skard]

Can you borrow a ground loop isolator to test? I used something like http://www.ebay.co.uk/itm/GROUND-LOOP-ISOLATOR-GOLD-PLATED-CONNECTORS-/140500004951?pt=UK_Computing_CablesConnectors_RL&hash=item20b673f057

I had a similar problem when I had run my VGA camera wire down with amp cables, one of those helped until I eventually swapped out the VGA cable for a properly insulated one.

If your audio wiring is easily accessible just have a quick look make sure nothing is loose/touching other wires.