Hi I just had alpine dlc177r's with dynamat put in the doors running of the factory head unit and I am getting a really high pitched noise notice it with low volume. Any help with what is causing it would be great its making my ears ring :(
Printable View
Hi I just had alpine dlc177r's with dynamat put in the doors running of the factory head unit and I am getting a really high pitched noise notice it with low volume. Any help with what is causing it would be great its making my ears ring :(
it could be your speakers set on high with high treble ? try lowering it.
and are you amplifying your speakers?
no amp just off the head unit
check the connections to ensure nothing is lose, might also be a grounding issue.
usually its poor grounding if running the speakers of the HU
Does the pitch change with engine rpm? Do you still get it with the engine off?