I am using the popular Polk PSW-10 external subwoofer with my T2, having it hooked into the spare lugs on the cabinet speaker. I have to have the volume of the sub turned up about 3/4 of the way to get any decent bass, but it sounds pretty good. I decided to hook up my Police Force into the other channel of the sub to have both working. The Police Force seems to put out a lot more volume, as I only need the sub turned up to less than halfway to get the same volume as T2. If I do that though, T2 has almost no bass, and hence if I turn it up to where T2 sounds good, Police Force has way too much. I figure I could rig up a mixer setup, but I am hoping there is an easier fix.