Specifications Nominal diameter 380 mm (15.0 in) Nominal impedance 8 Ω Minimum impedance 6.2 Ω Nominal power handling 1000 W Continuous power handling 2000 W Sensitivity (1W/1m) 97.0 dB Frequency range 35 — 1500 Hz Voice coil diameter 100 mm (4.0 in) Winding material Copper Former material Glass Fibre Winding depth 25 mm (1.0 in) Magnetic gap depth 12 mm (0.5 in) Flux density 1.2 T Design Surround shape Triple Roll Cone shape Radial Magnet material Neodymium Inside Slug Spider Double Silicone Pole design T-Pole Woofer cone treatment WP Waterproof Front Side Recommended enclosure 100.0 dm3 (3.53 ft3) Recommended tuning 40 Hz Parameters Fs 33 Hz Re 5.1 Ω Qes 0.23 Qms 4.3 Qts 0.22 Vas 139.0 dm3 (4.9 ft3) Sd 855.0 cm2 (132.5 in2) η₀ 2.1 % Xmax 9.0 mm Xvar 11.0 mm Mms 173 g Bl 28.0 Txm Le 1.9 mH EBP 143 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 181 mm (7.1 in) Flange and gasket thickness 16 mm (0.62 in) Air volume occupied by driver 6.0 dm3 (0.21 ft3) Net weight 8.6 kg (18.9 lb) Shipping units 1 Shipping weight 10.0 kg (22.0 lb) Shipping box 420x420x200 mm (16.5×16.5×7.9 in)