hey everyone. this is about my first time posting in this forum (although i have been reading it for awhile). I'm a somewhat veteran DIY'er with amps and such, but have yet to really build any speakers or subwoofers... I just came across a sub plate amp for a velodyne HGS18, and it needs a good home i already have a deftech supercube reference in my theatre room. it has usable output down to like 15hz, so it goes LOW. i want something to augment some of the higher bass frequencies (~60hz+), and have a bit of quick punch up there. i was thinking like 2 10's or something? im just not sure the difference between sealed, ported, etc... i want it to be clean. having HUGE outputs would be nice, but my other sub has that covered already. since the plate amp was free, im looking to not really spend that much on drivers. if there is a cheaper driver that performs reasonably well, thats what im in for. i would love to keep the project price pretty low. i have tools (band saw, scroll saw, circular saw, router, router table, dremel on steroids, etc...), so thats not a problem. i would just need MDF, stuffing, maybe ports, etc... i can get dynamat at cost too, so i would be lining the inside with that... phew! any suggestions guys?