Stereo System high pitch hum
I have a 2012 X30 with CMD6 clarion source unit and 3 JL amps. The system has always had a small high pitch hum that does not vary with RPMs. When I added a Wetsounds 420 SQ, the hum amplified. After hours of trouble shooting (grounds to one point, all B+ from the house battery pole on the battery selector, Rca wire isolation) I finally found that when I disconnect the clarion remote 8 pin DIN wire from the BIG computer, all noise disappears. Any ideas on how to get rid of this type of interference? Now, I just use my Wetsounds for volume control and have the unit disconnected from the BIG system.