The Revel Rhythm2 has an 18-inch aluminum driver with four-inch voice coil backed up with 2000 watts. Of course like any state-of-the-art sub it can be room corrected via USB, in this case with a third-party measuring tool. But this one is slightly unusual because it takes into account the bass output of the speakers as well as that of the sub. The demo was impressively powerful though marred by an unavoidable rattle in the room ventilation—if you want to own a sub this powerful, you may need to invest a little extra to make the room fit for it!