PowerBass S-12T Thin Mount 12" Single 4-Ohm Subwoofer By adding a tough wide roll rubber surround and 2-inch vented voice coil, PowerBass were able to develop a woofer that has the ability to play loud in small places. The PowerBass Thin Woofer makes true bass a reality. Starting with our proprietary poly-carbonate/glass fiber composite frame, PowerBass built a basket that is stronger than steel and lighter than cast aluminum. The unique one piece cone is another break through in woofer technology, more durable and stiffer then paper, this injected molded cone is able to withstand the abuse that comes from delivering deep bass in a small enclosure. Features - • Thin Mount 12" Single 4-Ohm Subwoofer • 300 watt RMS/600 Watts Max • Single Piece Custom Injected Molded Cone • Large Roll Rubber Surround • 2" Vented KSV Voice Coil Former • Perimeter Aero Voice Coil Venting • Poly-carbonate/Glass Fiber Composite Turbine Basket • Super Shallow 3.25" Mounting Depth • Chrome Push Terminals • Optimally Designed for Small Sealed Enclosures Specifications - • Nominal Impedance: Single 4-ohm • BL: 13.04 • Inputs: Single Coil • Subwoofer Frequency Range: 31 Hz - 350 Hz • Voice Coil Size: 2 in • Material: Injection Polypropylene • Magnet Size: 140 oz • Sensitivity (1W / 1M): 91 dB • Motor Structure: 140 oz • Cutout Diameter: 10 15/16" (278.0mm) • Mounting Depth: 3.25 in • Xmax: 6.8 mm • Spl: 91 dB • No: 0.238% • Qts: 0.634 • Qes: 0.758 • Qms: 3.866 • Mms: 186.3 g • Cms: 114.7 uM/N • Vas: 45.92 Ltr • SD: 530.9 sqCM • Fs: 34 Hz • Test Impedance: 3.2-ohms • VC Impedance: 4-ohm • Size: 12 in • Sensitivity: 91 dB • Frequency Response: 31 Hz - 350 Hz • Voice Coil Size: 2 in • Power Handling (RMS/Peak): 300 / 600 watts