I have a 2014 Coupe EX-L with Navi. The problem I am having is a popping sound coming from the left front door speaker. Even if I turn off the factory radio the popping sound will continue. I have swapped the factory amp but no success in eliminating what I call distortion. I have physically swapped speakers from right to left and the problem persists on the left front channel. I feel it has to be an electronic issue in the audio system. I can pull the main audio fuse and the issue stops, but of course I loose power to navi and radio. Has anyone experienced this and would have some advise? I am leaning towards the radio being defective. Any suggestions with an aftermarket radio that is fully compatible with factory options?