SPECIFICATION:

MODEL:TRF SW1820D2

Size: 18inch

Cone: Competition Grade paper

Surround material: Foam

Voice coil: 3.0inch

Voice coil layer: 4layer

Nominal impedance:dual 2ohm

Voice coil wire:aluminium

RMS Power: 2000wrms

MAX Watt:4000wmax

Sensitivity: 90.2dB

Resonance frequency(f0): 29.6Hz

Mechanical Q factor(Qms): 6.71

Electrical Q factor(Qes):0.64

Total Q factor:(Qts): 0.59

Xmax: 21mm

Force factor: 23.9N/A

Magnet Weight: 300Oz

Gascet:PVC

1=Outer Dimension:  468mm - 18.42"

2=Mounting Depth: 280mm - 11.02"

3=Magnet Dimension: 228mm - 8.98"

4=Mounting Hole Dimension: 425mm - 16.73"