ok right now i drive a 1988 chevy astro with a re xxx 18 and i got cdt cl-641's in my doors and the sound stage is way to low. now if i were to construct some kicks for my van would it be best to cross fire them to adjacent headrests? or a little more towards the center of car at headrest level. might be a noob question but i want this shiz done right the first time :P