PowerBass S-84 8" Dual 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 distinctive X design. A 1.5” BASV voice coil former is used on the 8-inch, and 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, S-Series woofers provide lots of value without sacrificing hard-hitting performance. Features - 8" Dual 4-Ohm Subwoofer 125 watt RMS/250 Watts Max Proprietary DDC Coated Paper/Wool Cone Pressed 4-Layer Large Roll Foam Surround 1.5" 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: 6.4 Inputs: Dual Coil Subwoofer Frequency Range: 42 Hz - 800 Hz Voice Coil Size: 1.5 in Material: Pressed Wool / Paper Magnet Size: 116 oz Sensitivity (1W / 1M): 86 dB Motor Structure: 116 oz Cutout Diameter: 7 1/8 in Mounting Depth: 3.5 in Xmax: 7 mm Spl: 86 dB No: 0.23% Qts: 0.46 Qes: 0.521 Qms: 4.3 Mms: 51.5 g Cms: 279 uM/N Vas: 18.4 Ltr SD: 206.12 sqCM Fs: 42 Hz Test Impedance: 1.65-ohms VC Impedance: 4-ohm + 4-ohm Size: 8 in Sensitivity: 86 dB Frequency Response: 42 Hz - 800 Hz Voice Coil Size: 1.5 in Power Handling (RMS/Peak): 125 / 250 watts