Specifications Nominal diameter 380 mm (15.0 in) Nominal impedance 8 Ω Minimum impedance 6.5 Ω Nominal power handling 700 W Continuous power handling 1400 W Sensitivity (1W/1m) 95.0 dB Frequency range 35 — 1500 Hz Voice coil diameter 100 mm (4.0 in) Winding material Copper Former material Glass Fibre Winding depth 21 mm (0.83 in) Magnetic gap depth 11 mm (0.4 in) Flux density 1.05 T Design Surround shape Triple Roll Cone shape Radial Magnet material Ferrite Spider Double Silicone Pole design T-Pole Woofer cone treatment TWP Waterproof Both Sides Recommended enclosure 120.0 dm3 (4.24 ft3) Recommended tuning 35 Hz Parameters Fs 39 Hz Re 5.2 Ω Qes 0.47 Qms 6.0 Qts 0.43 Vas 103.0 dm3 (3.64 ft3) Sd 855.0 cm2 (132.5 in2) η₀ 1.35 % Xmax 8.0 mm Xvar 6.5 mm Mms 160 g Bl 21.2 Txm Le 2.0 mH EBP 82 Hz Mounting And Shipping Info Overall diameter 393 mm (26.6 in) Bolt circle diameter 374 mm (14.7 in) Baffle cutout diameter 354.0 mm (13.9 in) Depth 168 mm (6.6 in) Flange and gasket thickness 16 mm (0.62 in) Air volume occupied by driver 6.3 dm3 (0.22 ft3) Net weight 9.8 kg (11.1 lb) Shipping weight 11.1 kg (24.4 lb) Shipping box 420x420x200 mm (16.5×16.5×7.9 in)