After searching I found a few suggestions however I feel that things were done right and I shouldnt have this prob...

Installed 4ch amp today.

2 x RCA's (ok quality RCA's) are running from amp in trunk up right hand side of car (if you are standing at trunk and looking forward to the bonnet) under the door sills etc

Speaker cable is all run down left side of car to the front splits. under the door sills etc.

power cable is really short and just running directly to battery.

When the accesories or engine is ON there is a buzzing/hissing sounds out of the front speakers...its there all through as you increase volume you just can hear it as much of course.

any suggestions?

what do these little noise suppression things do that you can wire up? sounds like a band-aid fix that most likely wont even work that well? anyone using one?

any other ideas?