PowerBass XL-844 8" 4-Ohm 200 Watt Subwoofer Boasting a custom turbine style frame constructed of polycarbonate/glass fiber, this unique basket supports dual stack magnets and a extended dome backplate. They utilize a combination of perimeter and pole venting to keep air circulating over the voice coil so everything stays cool. A non-pressed paper cone was selected for its natural smooth bass reproduction and its ability to provide high output with low distortion even under the stress of high SPL. Finally, to make sure the power gets to the subwoofer, they used chrome push terminals for maximum current transfer. Features - • NEW Large Roll Santoprene Surround • 8" Single 4-Ohm Subwoofer • 200 watt RMS/400 Watts Max • Proprietary Non-pressed Paper DDC Coated Cone • 2.0" Vented BASV Voice Coil Former • Perimeter Aero-Vent Voice Coil Cooling Vents • Proprietary Non Resonance Polycarbonate/Glass Fiber Basket • Chrome Push Terminals • Optimally Designed for Both Small Sealed or Ported Enclosures Specifications - • Nominal Impedance: Single 4-ohm • BL: 12.83 • Inputs: Single Coil • Subwoofer Frequency Range: 40 Hz - 400 Hz • Voice Coil Size: 2 in • Material: Non Pressed Paper • Magnet Size: 116 oz • Sensitivity (1W / 1M): 81.34 dB • Motor Structure: 116 oz • Cutout Diameter: 7 1/8 in (181.4mm) • Mounting Depth: 4.375 in • Xmax: 5 mm • Spl: 81.34 dB • No: 0.082 % • Qts: 0.506 • Qes: 0.557 • Qms: 5.532 • Mms: 98.79 g • Cms: 146 uM/N • Vas: 6.44 Ltr • SD: 176.71 sqCM • Fs: 41.9 Hz • Test Impedance: 3.5-ohm • VC Impedance: 4-ohm • Size: 8 in • Sensitivity: 81.34 dB • Frequency Response: 40 Hz - 400 Hz • Voice Coil Size: 2 in • Power Handling (RMS/Peak): 200 / 400 watts