Ground Zero GZRM 80SQ

Model Sound quality midrange speaker Diameter 80 mm / 3.15? Power handling (RMS/max.) 50 / 80 Watts Impedance 4 Ohms Efficiency 89 dB Frequency Response 140 Hz ? 4 kHz Voice coil 25 mm / 1? Cone anodized aluminum Magnetmaterial Neodymium Mounting Ø 77 mm / 3.03? Mounting depth 34 mm / 1.34? Resonance frequency (Fs) 114 Hz