Specifications Nominal diameter 380 mm (15.0 in) Nominal impedance 8 Ω Minimum impedance 6.4 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 11 mm (0.43 in) Flux density 1.1 T Design Surround shape Triple Roll Cone shape Exponential Magnet material Neodymium Ring Spider Double Silicone Pole design T-Pole Woofer cone treatment TWP Waterproof Both Sides Recommended enclosure 114.0 dm3 (4.0 ft3) Recommended tuning 35 Hz Parameters Fs 36 Hz Re 5.1 Ω Qes 0.31 Qms 4.2 Qts 0.29 Vas 125.0 dm3 (4.4 ft3) Sd 855.0 cm2 (132.5 in2) η₀ 2.0 % Xmax 10.0 mm Xvar 10.0 mm Mms 151 g Bl 25.0 Txm Le 2.0 mH EBP 116 Hz Mounting And Shipping Info Overall diameter 393 mm (15.5 in) Bolt circle diameter 374 mm (16.7 in) Baffle cutout diameter 353.0 mm (13.9 in) Depth 179 mm (7.05 in) Flange and gasket thickness 14 mm (0.55 in) Air volume occupied by driver 6.0 dm3 (0.21 ft3) Net weight 9.0 kg (19.8 lb) Shipping units 1 Shipping weight 10.0 kg (22.0 lb) Shipping box 420x420x200 mm (16.5×16.5×7.9 in)