I use an EV Sb121a self-powered 12" sub (300w) that is the same compact size as the EV Sx100 speakers. It does a nice job filling out the sound and really gives punch to the bass and drum sounds. It weighs about 36 lbs. and is very easy to handle.
I agree with UD, bass is the answer, more so than volume. With my sub, I notice only a slight increase in actual volume, but a very big presence of a clean lower end. The end result, I can run the entire system a number down on the volume level and get a better overall result. http://www.electrovoice.com/electrovoice/EVfiles.nsf/lookup/Sb121a/$File/SB121_534930.PDF

[This message has been edited by cassp (edited 05-21-2003).]

[This message has been edited by cassp (edited 05-21-2003).]