TECHNICAL PARAMETERS : 

Nominal Impedance 8 Ohm
Minimum Impedance 6.3 Ohm
AES Power above 0.9 kHz ( 1) 70 W
AES Power above 0.65 kHz 50 W
Maximum Power above 0.9 kHz ( 2) 140 W
Maximum Power above 0.65 kHz 100 W
Minimum Crossover Frequency ( 3) 0.9 kHz
Sensitivity ( 1W/ 1m) ( 4) 109 dB
Frequency Range 0.5÷ 18 kHz
Voice Coil Diameter 74 mm ( 2.91 in) 
Winding Material Al
Former Material Kapton
Diaphragm Material Titanium
Diaphragm Shape Dome
Winding Depth 2.35 mm ( 0.09 in) 
Magnetic Gap Depth 2.8 mm ( 0.11 in) 
Flux Density 1.8 T
Magnet Neodymium Slug Crown
Re 5.6 Ohm
Phase Plug Design Annular
NET Air Volume filled by HF Driver 0.7 dm^ 3 ( 0.025 ft^ 3) 

NOMINAL SPECIFICATIONS : 

Throat Diameter 35.6 mm ( 1.4 in) 
Overall Diameter 130.5 mm ( 5.14 in) 
90° Mounting Holes Diameter ( 4xM6) 102 mm ( 4.02 in) 
Depth 62 mm ( 2.44 in) 
Net Weight 2.9 Kg ( 6.4 lb) 
Shipping Box 185 x 170 x 122 mm
( 7.3 x 6.7 x 4.8 in) 
Shipping Weight 3.1 Kg ( 6.8 lb)