Ground Zero GZIW 300

Diameter 30 cm / 12? Power Handling (RMS) 350 Watts Impedance 4 Ohms Efficiency 88 dB Power Recommendation 200 ? 400 Watts Voice Coil 50 mm / 2? copper Membran Layout HQPP cone with 3D structure Max. Excursion (Xmax) 28 mm / 1.10? Mounting Ø 287 mm / 11.30? Mounting Depth 149 mm / 5.87? Resonance Frequency (Fs) 30 Hz Overall Qaulity (Qts) 0.58 Equiv. Air Volume (Vas) 69.3 L / 2.45 cu.ft.