TECHNICAL PARAMETERS : 

Nominal Impedance 8 Ohm
Minimum Impedance 7 Ohm
AES Power Handling ( 1) 30 W
Maximum Power Handling ( 2) 60 W
Minimum Crossover Frequency ( 3) 2 kHz
Sensitivity ( 1W/ 1m) ( 4) 108 dB
Frequency Range 1.5÷ 20 kHz
Voice Coil Diameter 25 mm ( 0.98 in) 
Winding Material Al
Former Material Kapton
Diaphragm Material Ketone Polymer
Diaphragm Shape Dome
Winding Depth 1.7 mm ( 0.07 in) 
Magnetic Gap Depth 2 mm ( 0.08 in) 
Flux Density 1.7 T
Magnet Ferrite Ring
Re 6 Ohm
Phase Plug Design Radial
NET Air Volume filled by HF Driver 0.25 dm^ 3 ( 0.009 ft^ 3) 

NOMINAL SPECIFICATIONS : 

Throat Diameter 25.4 mm ( 1 in) 
Overall Diameter 108 mm ( 4.02 in) 
180° Mounting Holes Diameter ( 2xM6) 76 mm ( 2.99 in) 
Depth 55 mm ( 2.17 in) 
Net Weight 830 g ( 1.8 lb) 
Shipping Box 147 x 130 x 82 mm
( 5.8 x 5.1 x 3.2 in) 
Shipping Weight 862 g ( 1.90 lb)