Ground Zero Hydrogen GZHW 38-D2

Model High-Performance Subwoofer Diameter 38 cm / 15″ Power handling (RMS/SPL) 1500 / 3500 Watts Impedance 2x 2 Ohm Efficiency 87 dB Power recommendation 1500 – 3500 Watt Voice coil 75 mm / 3″ copper Cone Reinforced paper Max. Excursion (Xmax) 45 mm / 1.77″ Mounting Ø 360 mm / 14.17″ Mounting depth 231 mm / 9.09″ Resonance frequency (Fs) 36.3 Hz Overall quality (Qts) 0.52 Equiv. air volume (Vas) 32.8 L / 1.16 cu.ft.