ok guys, time for an update..
about a month ago, i started to hear a whine coming from speakers...it's been getting worse as time progresses.
When i go over a bump it can come and go, sometimes with a 'clicking' noise like a loose connection
happens when car is turned off as well...but it increases with revs etc when the car is turned on..
I've checked all MY wiring and everything seems firm and stable.
Any ideas how to track it down?
Could it be a failing PSU?