TRF SPL SW1830 D1

MODEL:TRF SPL SW1830 D1 Size: 18inch Cone: Competition  Grade Paper Surround material: Foam Voice coil: 3.0inch Voice coil layer: 8layer Nominal impedance:dual 1ohm Voice coil wire:aluminium RMS Power: 3000wrms MAX Watt:6000wmax Sensitivity: 91.2dB Resonance frequency(f0): 34.8Hz Mechanical Q factor(Qms): 6.71 Electrical Q factor:(Qes):0.64 Total Q factor:(Qts): 0.59 Xmax: 21mm Force factor: 14.8N/A Magnet Weight: 300Oz Gascet:aluminium   1=Outer Dimension:  467mm - 18.4" 2=Mounting Depth: 298mm - 11.7" 3=Magnet Dimension: 226mm - 8.9" 4=Mounting Hole Dimension: 428mm - 16.9"