NOMINAL SPECIFICATIONS : 

Nominal Diameter 460 mm ( 18 in) 
Overall Diameter 460 mm ( 18.11 in) 
Bolt Circle Diameter 440 mm ( 17.32 in) 
Baffle Cutout Diameter 421 mm ( 16.57 in) 
Depth 208.5 mm ( 8.20 in) 
Flange and Gasket Thickness 13.7 mm ( 0.54 in) 
Net Weight 12.1 Kg ( 26.7 lb) 
Shipping Box
( Single Carton Box) 503 x 500 x 258 mm
( 19.8 x 19.7 x 10.2 in) 
Shipping Weight 13.5 Kg ( 29.8 lb) 

TECHNICAL PARAMETERS : 

Nominal Impedance 8 Ohm
Minimum Impedance 6.5 Ohm
AES Power Handling ( 1) 1200 W
Maximum Power Handling ( 2) 2400 W
Sensitivity ( 1W/ 1m) 98 dB
Frequency Range 35÷ 1600 Hz
Voice Coil Diameter 100 mm ( 4 in) 
Winding Material Cu
Former Material Glass Fiber
Winding Depth 28.9 mm ( 1.14 in) 
Magnetic Gap Depth 12 mm ( 0.47 in) 
Flux Density 1.1 T
Magnet Ferrite Ring
Basket Material Aluminum
Demodulation Aluminum Ring
Cone Surround ( 3) Triple Roll
NET Air Volume filled by Loudspeaker 6.5 dm^ 3 ( 0.230 ft^ 3) 
Spider Profile 2x non-adjacent symmetrical constant height waves