Principle / DIN Ø 12" subwoofer Power handling RMS / max. 500 / 1200 watts Impedance 3 ohms Frequency response 19-250 Hz Sound pressure level 90 dB Outer diameter 341 mm Cutting out 295 mm Mounting depth 140 mm Rdc 2,9 Ohm Fs 30 Qms 3.90 Qes 0,46 Qts 0,41 Vas 72 L Xmax 22 mm Basket Aluminium Druckguss Free Air no Highlights AF-Tec (Airflow Technology): 2? high-performance voice coil with Japanese TOTOKU wire Air-dried multi-layer compressed paper membrane with 20% carbon fibre Highly flexible rubber puck with reinforced seal bearing surface High-power double magnet system with chromed pole plate Klippel-optimized symmetrical magnetic field Nickel-plated push terminal for use with cables up to 6 mm_ Sophisticated diamond cut