Ground Zero GZRW 8FL

.Model High-Quality Flat Subwoofer Diameter 20 cm / 8? Power handling (RMS) 150 Watts Impedance 2 Ohms Efficiency 85 dB Power recommendation 80 ? 200 Watts Voice coil 36 mm / 1.4? copper Cone IMPP Max. Excursion (Xmax) 14 mm Mounting depth 55 mm Resonance frequency (Fs) 45.3 Hz Damping ratio (Qts) 0.938 Equiv. air volume (Vas) 17.6 L