The glidetouch is a pain in the ass. If you don't use it everyday, you won't know how to work it. My GF hops in the car and can't get it to work right. I can do it just fine.

This is Alpine's top, non-LCD, headunit. It has so many features on it, you'll have a hard time adjusting the "bass" alone.

ex
You can tune 4 speakers individually. Since you're not sitting in the center of your car, you can actually adjust speakers to "time delay" so the sound will hit all at the same time.