Nominal diameter 380 mm (15.0 in) Nominal impedance 8 Ω Minimum impedance 6.2 Ω Nominal power handling 400 W Continuous power handling 800 W Sensitivity (1W/1m) 100.0 dB Frequency range 40 — 2000 Hz Voice coil diameter 76 mm (3.0 in) Winding material Copper Former material Glass Fibre Winding depth 16 mm (0.62 in) Magnetic gap depth 11 mm (0.4 in) Flux density 1.15 T Design Surround shape Triple Roll Cone shape Exponential Magnet material Ferrite Spider Single Pole design T-Pole Woofer cone treatment WP Waterproof Front Side Recommended enclosure 100.0 dm3 (3.53 ft3) Recommended tuning 50 Hz Parameters Fs 42 Hz Re 5.0 Ω Qes 0.26 Qms 5.9 Qts 0.25 Vas 164.0 dm3 (5.8 ft3) Sd 855.0 cm2 (132.5 in2) η₀ 4.5 % Xmax 5.0 mm Xvar 8.0 mm Mms 88 g Bl 22.1 Txm Le 1.3 mH EBP 161 Hz Mounting And Shipping Info Overall diameter 393 mm (15.5 in) Bolt circle diameter 374 mm (14.7 in) Baffle cutout diameter 354.0 mm (13.9 in) Depth 169 mm (6.65 in) Flange and gasket thickness 16 mm (0.62 in) Air volume occupied by driver 5.2 dm3 (0.18 ft3) Net weight 8.5 kg (18.7 lb) Shipping units 1 Shipping weight 10.2 kg (22.4 lb) Shipping box 420x420x200 mm (16.5×16.5×7.9 in)