new10quest,
I am a former Klipsch Sub-10 owner and I agree that it's a good and reliable product; however, when you compare price to performance, internet direct brands can give you SO much more! I now own 2 HSU subs and swear by them. You won't find a klipsch sub that can drop below 20hz for the same price, period. In regard to B-Stock, I believe it refers to refurbished or older models.
Sholling,
I have a down-firing Hsu MBM-12, do I still need a subdude? I have carpeted floors and it's located between the couch and chair.