2l8iwn

I have the two dvd players in the head rests. i have a multiport box that links the two together under the drivers seat. This box also has two additional connect ports for aux devices. What i was hoping to do was if the pioneer dvd console unit has an a/v out and connect to the box under the drivers seat so we could play a movie and watch from the front player as well as the two headrests. Not this all may be in vein if the console deactivates the video when not in park. That is again IF the console unit even has A/V out. anyone? Also i was thinking of upgrading the subwoofer. I saw from another post it looks as if they are using a dual voice coil sub. Is this upgradable? any benefits from going with a jl or kicker without upping the amp?

thoughts?