Need some help here, stereo gurus. I just got a new head unit that I'm going to drop in my T-5R in the next few days. <p>This one: <A HREF="http://alpine-usa.com/US-en/products/product.php?model=iXA-W404&view=Specs" TARGET="_blank">http://alpine-usa.com/US-en/pr...Specs</A> <p>Anyway, my car came with the premium sound, which included a stock amp (I think under the seat?) which plugged into the rear of the head unit with a big, round, six-pin connector. My Alpine head unit obviously has nothing of the sort. Just pre-amp outputs that are just red and white RCA cables, plus the usual wiring. So, is there any connector or any re-wiring I can do to preserve that stock amp? And I guess the more important question is whether it is worth it at all, as the new head unit puts out a decent 50Wx4. <p>Second question: The new head unit plays iPod video and has an optional navigation component that I may buy later. Because of this, it has wires that are to be connected to the foot and parking brakes to sense when the system is allowed to let me play things. To make it think I'm always stopped, would I attach those wires to something that always has power when the car is on? I'm guessing that's the case since the wires would sense when the brake lights are activated or when the parking brake light goes on in the gauge cluster.