I just picked up a new 2006 Dodge Grand Caravan. It has the stock POS stereo, not the Infinity upgrade. While I am basically OK with the head unit, the speakers seem to have a very uneven frequency response and the treble distorts easily. There appears to be a dash mount driver or tweeter and a door mount woofer on each side in the front. The back looks to have a tweeter pod and woofer on each side; but I am not as concerned with the back. Does anyone have any specific knowledge of these models and any good suggestions?