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      21FW500
      21 Inch Professional Subwoofer, 200 Oz Ferrite Magnet, 5 Inch IN/OUT Voice Coil...
      *MODEL NO.:21FW500
      *Nominal Diameter @ inch21
      *Rated Impedance @ ohm8
      *Power Handling Capacity @ watt2000
      *Program Power @ watt4000
      *Sensitivity(1W/1m) @ dB97.5
      *Frequency Range @ Hz32-1500
      *Minimum Impedance @ ohm5.4
      *Voice Coil Diameter @ inch5
      *Voice Coil Materialcopper
      *Voice Coil Former MaterialTIL
      *Voice Coil Winding Depth @ mm26
      *Number of Layers2
      *Kind of Layerinside/outside
      *Gap Height @ mm12
      *Magnet Weight @ oz200
      *Magnet Size @ mm280*25
      *Basket MaterialDie-cast Alu.
      *Cone MaterialNon pressed pulp
      *Cone DesignStraight
      *Surround MaterialPolycotton
      *Surround DesignTriple roll
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