From what I can tell, although this unit was for home theatre and from your kind responses this Sub should do fine. I did have it hooked up to my Yamaha organ through my stereo and did seem to do very well. The hookup seems a little problematic because I'm not sure how to wire this deal. The low level output from either the Yamaha or Kurz my not be enough to drive the sub properly. I do not want to use my stero recever, my guess is I will have to use a mixer of some sort.
Oh what are decent inexpensive powered speakers maybe around $150-$300 a pair. Correct me if I'm wrong but I'm assuming that speakers made for live playing are much better then regular stero speakers. I do not gig and only play at home I like a lot of organ so the LOWS are important. I'm a keyboard junkie and can't play for beans but still love playing and it keeps me off the street from chasing cars.

I was thinking of the motion pro but the bank is broken with the new (used Kurzweil) coming.

Jerry