Room-Filling, Full, Loud, Clean Sound, w/ Two Subwoofers = a pair of Definitive Technology BP7000SCs for $3,600 (20 Hz - 20,000 Hz +/- 3dB). The Two built-in 1,800-watts RMS 14-inch subwoofers in this pair of SuperTowers are equivalent to 7 SuperCube I subwoofers (according to Def Tech). My music/movies volume is always less than 85 dBA (don't want hearing loss, do we?). My Current HT room is not all that big--just 15' Wide x 17' Long x 15' Ceiling. But even with my HT door closed, I can hear the thundering bass loudly across my 3,000 s.f. house. And my Subwoofer level is set at 50% only.
My goal for my next custom built HT room is for a 25' x 40' x 15' room. And I will have FOUR BP7000SCs (Front L/R, Rear L/R), one CLR3000 (Center), & four SM450s (Surrounds L/R). According to Def Tech, this will be the equivalent of 14 SuperCube I subwoofers. Some people will argue. That's okay. But I sure can feel it & believe it.