Ground Zero Hydrogen GZHW 20-D1

- Model High-Performance Subwoofer - Diameter 20 cm / 8? - Power handling (RMS/SPL) 700 / 1500 Watts - Impedance 2x 1 Ohms - Efficiency 80 dB - Power recommendation 50 ? 1500 Watts - Voice coil 63 mm / 2.5? Copper - Cone Reinforced paper - Max. Excursion (Xmax) 40 mm / 1.57? - Mounting Ø 187 mm / 7.36? - Mounting depth 145 mm / 5.71? - Resonance frequency (Fs) 38.3 Hz - Overall quality (Qts) 0.381 - Equiv. air volume (Vas) 4.77 L / 0.17 cu.ft.