Ground Zero GZUM 80SQ

Diameter 80 mm / 3.15? Power Handling (RMS/max.) 50 / 80 Watts Impedance 4 ohms Efficiency 90 dB Frequency Response 200 Hz ? 6 kHz Voice Coil 25 mm / 1? Membran Layout Black anodyzed aluminum Mounting Depth 35 mm / 1.38?.