SVS PC12-Plus Subwoofer &ndash; 12-inch Driver, 800-Watts RMS, Ported Cylinder Cabinet 12-inch high-excursion Plus Series driver with dual ferrite magnets and an FEA-optimized motor generates massive SPLs and remains accurate and controlled at the most punishing drive levels. 800 Watts RMS, 2,300+ Watts Peak Power Sledge STA-500D DSP delivers effortless power and sophisticated processing for pinpoint accuracy at all playback levels. Weight: 75 lbs.; Dimensions: 39.56 (Height) x 16.6 (Diameter) Rigidly braced, sonically inert and custom tuned ported cylinder cabinet is a blank canvas for pure, distortion-free bass. Only 17-inches in diameter. If there is a single subwoofer that revolutionized both the price/performance ratio and the way we buy subwoofers, the SVS powered cylinder is it.  AVForums