Powerbass PSWB112 Single 12-Inch Loaded Enclosure Recommended power range: 100 - 275 watts RMS @ 4Ohms Impedance: 4 ohm Dynamic damping coating paper cone Double pressed treated foam Surround Double rolled foam Surround ensures linear travel throughout the entire frequency range which provides more bass output, higher efficiency, and reduced distortion 12-Inch Woofer in a heavy-duty factory tuned non-resonant enclosure wrapped in two tone aviation grade vinyl covering Bass reflex single port system woofer featres 2-layer Black ribbed paper cone with DDC finish BASV High temperature voice coil Double pressed and treated foam surround 275W RMS/550 Watts peak power handling 4-Ohm system impedance