PowerBass S-1204D 12" Dual 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 - • 12" Dual 4-Ohm Subwoofer • 300 watt RMS/600 Watts Max • Proprietary DDC Coated Paper/Wool Cone • Pressed 4-Layer Large Roll Foam Surround • 2" Vented BASV Voice Coil Former • Perimeter Aero-Vent Voice Coil Cooling Vents • Non Resonance DDC Coated Stamped Steel Basket • Rubber Mounting Gasket/Trim Ring • Chrome Push Terminals • Optimally Designed for Both Small Sealed or Ported Enclosures Specifications - • Nominal Impedance: Dual 4-ohm • BL: 9.1 • Inputs: Dual Coil • Subwoofer Frequency Range: 31 Hz - 500 Hz • Voice Coil Size: 2 in • Material: Pressed Wool / Paper • Sensitivity (1W / 1M): 88 dB • Motor Structure: 142 oz • Cutout Diameter: 11 11/16 (297.0mm) • Mounting Depth: 5.5 in • Xmax: 9.5 mm • Spl: 87.5 dB • No: 0.30% • Qts: 0.5 • Qes: 0.56 • Qms: 4.5 • Mms: 150.5 g • Cms: 175.3 uM/N • Vas: 64.9 Ltr • SD: 510.7 sqCM • Fs: 31 Hz • Test Impedance: 1.6-ohm • VC Impedance: 4-ohm + 4-ohm • Size: 12 in • Sensitivity: 88 dB • Frequency Response: 31 Hz - 500 Hz • Voice Coil Size: 2 in • Power Handling (RMS/Peak): 300 / 600 watts