Ground Zero GZUK 165SQ

Diameter 165 mm / 6.50? Power Handling (RMS/max.) 120 / 180 Watts Impedance 4 Ohms Efficiency 87 dB Frequency Response 40 Hz ? 3500 Hz Voice Coil 50 mm / 2? copper Membran Layout anodized aluminum Magnet material Neodymium Mounting Ø 144 mm / 5.67? Mounting Depth 63 mm / 2.48? Resonance Frequency (Fs) 54.6 Hz.