I recently installed my RNS-E I got from rival. Couldn't have been easier. I'm glad I opted for the under dash antenna, ripping the headliner down would have been a tedious project. Everything seems to work except my sound quality is bad and by driver front speakers don't work. Has anyone has this problem? Any suggestions? I have toyed with all the digital adjustments to no avail. My only guess is that I might have a bum harness.