I have a 2008 Ford Edge Limited AWD and I have an issue with the sound system. When listening to music sometimes the Bass and Treble just stop working making the music sound awful. I found that turning off the stereo system then turning it back on after a second or two fixes the issue, but this problem occurs very often for me (about 2-3 times on a 3 mile drive). I believe the sound amplifier is the issue but I don't know where to locate the amp or which one I should purchase. Can anyone help with this issue? thanks.