how can someone optimize a subwoofer to give more punch? and, how can someone optimize a subwoofer to give more rumble? i personally like punch, it's a lot more clean and it doesn't fade away from any trebble. is a rumbling subwoofer just a bad sub or what? also, are there certain brands of subs that give a better punch, what size is a good choice, and does it just take a box to put it in to optimize punch and lower the rumbling? i know my question is pretty general, but any help would be appricated. thanks in advance, peace out.