BSoundstream R1.122 12" 850 Watt Subwoofer Reference ReviewbP PP Soundstream R1.122 12" 850 Watt Subwoofer Reference PR1-122 - Soundstream 12" 850W RMS 1700W Max Dual 2-Ohm Reference R1 Series SubwooferPOversized concave IMPP primary conePDie-cast aluminum soundstream reference R1 framePInverted roll polyether foam surroundPTop-mount depth: 7.