I am trying to decide what to put in for subs. I'm really leaning towards a single JL 12w6, powered by a JL HD 70/1 amp, and in a ported enclosure. haven't decided on custom or not. how much does it typically cost for a custom box. Would a box that recessed into the hatch side of the wall, with the sub towards the top, facing the back, work? I was told that that amp, and speaker are a perfect combination. Kinda pricey though. ny suggestions are welcome, and thanks, chris