I recently replaced my factory head unit in my 2002 GT with a Kenwood DPX303. I did this because of the CD jamming issues. Other than that I was happy with the Mach 460 system. I used a Metra harness to be able to keep using factory amps and speakers. The problem I am having now is the Kenwood sounds great when listening to the tuner, but when I use CD or Aux it sounds weak and almost like it is lacking bass and too much treble. Like I said in tunner mode it really sounds good and at least as well as the original HU. I have made all the adjustments that I possibly can with filters and equalizer. Any idea what might be wrng here? Thanks in advance for any words of wisdom.