Ground Zero GZUW 8SQ-D2

- 20 cm / 8? SQ Subwoofer, - 300 WRMS - Rec. amplifier power 2-400 Watts ( rms ) - 2 x 2 ohm - 50 mm / 2? copper voice coil - Reinforced paper cone - Audiophile POLYCOT spider - Fs 56.9 Hz - Qms 11.92 - Qes 0.74 - Qts 0.69 - Vas 4.8L - Le 1.57 mH - Mms 92.9 gr - Bl 13.55 - Xmax 20 mm - Effiency 83 dB - Outer diameter 215mm - Mounting cut out 181mm - Mounting depth 108mm.