I purchased a used 2014 wagon in titanium trim.  The previous owner installed an alarm and who know what else.  The wiring behind the glovebox was a mess.  My stereo was barely audible unless three quarters up?  I wonder if the modifications had anything to do with that.  I will try to document my stereo upgrade as much as I can.   The plan is to install an amp, component speakers for the front, and a sub.  I will not mess with the head unit or bother with the rear speakers.  I already had