Sub for monster BASS!!!!!!

sounds like you might wanna try out a product a heard, er felt, at ces. it's perfectly named "the buttkicker." (i'm not kidding: all their reps had on shirts with their cool logo.) it can be installed in or under chairs or on platforms if you listen & dance simultaneously. it provides the feel of gut whacking bass without disturbing the rest of your family or neighbors. if it's a sub you want, go for a front firing unit, not one that fires downward. there are lots of these available as ht products. should be able to find several used ones here. oh yeah, i highly recommend a powered unit to get the kinda bass you desire. (the hsu will never work for you, IMHO.)

For money no object, check out the Wilson XS. At over 7 feet tall and over 700 lbs. a piece with 2 19" woofers, these will cycle at 16 Hz at ridiculous volumes. And they should for around $40K a piece!

NHT has a new sub with 2 front firering 12" drivers in a sealed box. I was impressed. A lot less boomy than thier ported units.

Yeah, you can see the Wilson XS's at wilsonaudio.com. They had 'em two years ago at CES...TWO IN A HOME THEATER SETUP, with 5 X-1 grand slamms along with it. I think they were powered by 2 Pass x-1000's each.

The Genesis 900 sub will literally shake everything off your walls for a couple floors in either direction.