okay, wasn't thinking about the moisture concept. so i'll be useing 1" ply now. (please give any other pointers that i have obviously overlooked and will curse myself for later, once i've built this beast).
But now i was wondering what brand of speakers i should be looking into. i only know car audio subs, not amp loudspeakers. i want to spend an average amount of money on them, so nothing too extreme. but definitly higher end 15's.