Join Date: Oct 2004
Location: The Holy City of Kent, WA
I'm certainly no electronics guru, (as you'd realize if you saw the speghetti dinner that is my accessory wiring), but I had similar interference with my XM. Check all of your power and audio cables. Make sure all are well insulated/isolated and that everything is properly grounded. In my case, it was an audio feed coupling that was near the rear tank "seam" that was introducing the noise. I relocated it and the problem is solved. I'm not saying some sort of add-on filter won't be necessary in your case, just that I'd always prefer instead to eliminate the source of the noise if possible.