I'll take a stab at it! I figured I owed this board something for the tips in getting and installing my Mopar sub. Besides removing the radio and reinstalling it has become routine for me these past few weeks.
(Be sure and get some soft tips for your pliers to prevent damage when removing the heater control knobs.)
I tuned my stock radio to a local station and did a comparison with and without the sub in the circuit. While doing so, I tuned the fade adjustment to the front to minimize the sub volume. If there was a difference in the low frequency to the door speakers I didn't notice it.
One thing I have noticed is the sub and enclosure are tuned to a very narrow frequency. When that frequency is playing the sub booms very loud! Outside of that frequency it isn't nearly as loud. Does anyone have any suggestions?