I hope this isn't a stupid question, but is a powered subwoofer a good idea to use as an extension cabinet for a bass combo? The reason I ask is I just bought one of these to use as a sub with the two Kustom PA50 powered PA speakers I currently own: http://www.musiciansfriend.com/pro-audio/kustom-pa-kustom-pa112s-powered-sub It's a powered 200 watt 12" subwoofer that is the match for both my PA50 speakers that I take out for jams and small gigs and my Kustom Profile System 1 PA that I use in my jam room, so it will have plenty of use. However in reading the reviews online, it seems some people use these as extension cabinets for their bass amps. That made me think I could line out my Traynor SB115 to it and use it as an extension cab in a pinch, or just to get a different tone. Anyway, I bought the thing before I even read the reviews without any idea that maybe I could use it as an extension cab, so I'm happy either way, but it would be nice if it could do double (triple) duty as a powered extension cab. I will of course try it out when I receive it, but in the meantime any thoughts?