Specifications Nominal diameter 380 mm (15.0 in) Nominal impedance 8 Ω Minimum impedance 6.9 Ω Nominal power handling 600 W Continuous power handling 1200 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 19 mm (0.75 in) Magnetic gap depth 11 mm (0.43 in) Flux density 1.3 T Design Surround shape Triple Roll Cone shape Exponential Magnet material Neodymium Ring Spider Double Silicone Pole design T-Pole Woofer cone treatment WP Waterproof Front Side Recommended enclosure 90.0 dm3 (3.18 ft3) Recommended tuning 53 Hz Parameters Fs 42 Hz Re 5.3 Ω Qes 0.23 Qms 4.3 Qts 0.22 Vas 130.0 dm3 (4.5 ft3) Sd 855.0 cm2 (132.5 in2) η₀ 4.4 % Xmax 8.0 mm Xvar 10.0 mm Mms 104 g Bl 25.5 Txm Le 1.25 mH EBP 182 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 177 mm (7.0 in) Flange and gasket thickness 16 mm (0.62 in) Air volume occupied by driver 3.7 dm3 (0.13 ft3) Net weight 5.6 kg (12.3 lb) Shipping units 1 Shipping weight 7.0 kg (15.4 lb) Shipping box 420x420x200 mm (16.5×16.5×7.9 in)