Nominal impedance 4 ohms Max / RMS-Power (according to manufacturer), W 600/300 Reference sensitivity, dB / W (1m) 87.8 Frequency response (Wl, 25 - 100 Hz), 3.8 dB Average SOI (96 dB, 50 - 125 Hz), 3.78% Normalized acoustic amplification (FI, 25 - 100 Hz), 7.3 dB Normalized sensitivity sensors (FI), dB / W 95.1 Equivalent of clearance, 51.1 L