Power Handling (RMS/max.) 50 / 80 Watts Impedance 4 Ohms Efficiency 84 dB Frequency Response 600 Hz – 24 kHz Voice Coil 16 mm / 0.63″ Membran Layout Anodized aluminum Mounting Ø 48 mm / 1.89″ Mounting Depth 39 mm / 1.54″ Resonance Frequency (Fs) 440 Hz.