One or two subwoofers?

Dazzdax

One sub will be fine for you. Here is a link to some subwoofer info. http://www.soundstage.com/maxdb/maxdb021999.htm

Dave

Agree with Rkeman, Crossover frequency should be determined and set at a point above which your main speakers bass no longer has flat frequency response. Small speakers require higher crossover point, this can cause image shift with only one sub unless it's placed between the main speakers.

Dave

I'm running three subs, one from my pre-pro's LFE out and two from an extra set of pre-outs. I use an outboard crossover for the stereo pair set at 35hz and run my mains full range. The third sub only comes into play for movies.

Dave