Ground Zero GZNW 30XMAX-II

Type High-Performance Low-Bass-Subwoofer Diameter 30 cm / 12″ Power handling (RMS) 3000 Watts Impedance 2x 1 Ohm Efficiency 83 dB Power recommendation 2000 – 4000 Watts Voice coil 75 mm / 3″ CCA Cone Aluminum Max. excursion (Xmax) 60 mm / 2.36″ Mounting Ø 282 mm / 11.10″ Mounting depth 250 mm / 9.84″ Resonance frequency (Fs) 35.6 Hz Damping ratio (Qts) 0.61 Equiv. air volume (Vas) 13.6 L / 0.48 cu.ft.