– impedance 4 Ohm – frequency response 3 – 20 kHz – efficiency (SPL) 89 dB – resonance frequency 1700 Hz – power handling (RMS)* 40 Watt / Watts (HPF @ 3500 Hz / – 12dB/Okt./oct) – power handling (max)* 70 Watt / Watts (HPF @ 3500 Hz / 12dB/Okt./oct) – cut-off frequency (HPF) 3500 Hz / 12 dB ( recommended) – outer diameter 54 mm / 2.13” – mounting cutout 46 mm / 1.81” – mounting depth 18 mm / 0.70.