– High power 16 cm / 6.5” SPL subwoofer – Klippel® optimized – Double magnet – Stable aluminum cast basket – Reinforced paper cone – Double spider – 50 mm / 2” Copper voice coil – High-roll sandwich surround – Speaker wire connection Diameter: 177 mm / 6.97“ Mounting diameter: 153 mm / 6.02“ Mounting depth: 110 mm / 4.33“ Voice coil: 50 mm Kupfer / 2″ copper Cone: Reinforced paper Power Handling: 1000 W SPL Power Impedance: 2 x 2 Ohm SPL: 81 dB Xmax: 30 mm / 1.18” Fs: 51 Hz Qts: 0.46 Vas: 2.8 L / 0.10 cu.ft..