Choice. Might I suggest
this sub. I think it's a relist (no one bought it last time), and pick up only (those are the best bargains). I already have too many subs and speakers (I bought more after you made me look last time). It's a fixed 80Hz crossover (not adjustable), but that works. 10" driver, 70W. Also nice having the line in/line outs for easy connectivity.