Single 18" subwoofer
Features:
Components:  1 x 18" Bass Drivers with 100mm (4") Voice Coil and "Alloy" Chassis
Sensitivity: 101dB 1W/1mtr (half space)
Maximum SPL (program): 137dB 
Frequency responce: 36Hz-190Hz (-6dB)
Connections: 2 x SPeakon NL4 Sockets 
Box Consruction: 18mm, High Density Poplar Plywood. CNC Manufacturing 
Lifting: 2 x Recessed, Steel Bar Handles
Mid-High Mounting: 1 x M20 Recessed "top-hat" Mount
Net Weight: 42kg (without casters)
Size (W x D x H)mm: 
Heavy duty punched, protective, grill with rear foam for dust proofing and abuse protection
Waterproof and Wear-Resisting Paint finish
Colour: Black
3-year Australian warranty (warranty does not cover over-driven coils)
Electrical: 
Power handling (Program): 2400watts
Nominal Impedance: 8ohm
Recommended Crossover Frequencies:
High-Pass: 38 - 55Hz @ 24dB/octave
Low-Pass: 160 - 100Hz @ 24dB/octave
Optional Accessories:
4 x AR-SC4BL Swivel Caster with Brake
1 x LF118XCVR weatherproof Cover