PowerBass S-1004 10" Single 4-Ohm Subwoofer PowerBass S-Series woofers featuring a 4-layer wool/paper cone now sport a treated non-resonant finished, stamped steel basket that is custom tooled with our distinctive X design. A 2” BASV voice coil former (1.5" on the 8") is used on the 10 and 12-inch models and like the entire Auto sound range, we also offer a Large Roll foam surround for precise linear movement of the cone, which equals loud bass. The S Series subwoofers are well-suited for small sealed or ported enclosures and use dual 4-ohm and single 4-ohm voice coils for multiple bass applications. Now more than ever, the S-Series woofers provide lots of value without sacrificing hard-hitting performance. Features - • 10" Single 4-Ohm Subwoofer • 275 watt RMS/550 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: Single 4-ohm • BL: 11.6 • Inputs: Single Coil • Subwoofer Frequency Range: 33 Hz - 500 Hz • Voice Coil Size: 2 in • Material: Pressed Wool / Paper • Sensitivity (1W / 1M): 86 dB • Motor Structure: 116 oz • Cutout Diameter: 9 1/8 (230.1mm) • Mounting Depth: 5.25 in • Xmax: 9 mm • Spl: 86.6 dB • No: 0.29% • Qts: 0.4 • Qes: 0.43 • Qms: 5.12 • Mms: 94.2 g • Cms: 270 uM/N • Vas: 43.8 Ltr • SD: 330.06 sqCM • Fs: 33.5 Hz • Test Impedance: 3.2-ohms • VC Impedance: 4-ohm • Size: 10 in • Sensitivity: 86 dB • Frequency Response: 33 Hz - 500 Hz • Voice Coil Size: 2 in • Power Handling (RMS/Peak): 275 / 550 watts