The whine starts as soon as you turn anything on audio-wise, whether it be the regular radio or the xm radio. As soon as you turn the power off to either the regular radio or the xm, the whine stops. You can drive the car with the radio/xm off in perfect peace. But, as soon as you turn one of them off, you pick up a whine that as you go faster in the car, the whine gets higher pitched. If you turn the volume up on the radio, the whine gets louder. Any suggestions?