Ground Zero GZNW 30SPL-D1

Diameter 30 cm / 12? Power Handling (RMS/SPL.) 3000 / 6000 Watts Impedance 2x 1 Ohms Efficiency 87.5 dB Power Recommendation 2000 ? 6000 Watts Voice Coil 75 mm / 3? CCA Membran Layout Reinforced paper Max. Excursion (Xmax) 70 mm / 2.76? Mounting Ø 281 mm / 11.06? Mounting Depth 237 mm / 9.33? Resonance Frequency (Fs) 38.6 Hz Overall Qaulity (Qts) 0.38 Equiv. Air Volume (Vas) 23.6 L / 0.83 cu.ft..