Rated power20 W Maximum power 30 W Nominal impedance Z 4 Ohm Frequency response 80–16000 Hz Mean sound pressure level 85 dB (1 W/1 m) Resonance frequency fs 120 Hz Magnetic induction 0,85 T Magnetic flux 260 Wb Height of front pole-plate 4 mm Voice coil diameter 20 mm Cutout diameter 101 mm Net weight 0,275 kg D. C. resistance Rdc 3,8 Ohm Mechanical Q factor Qms 3,13 Electrical Q factor Qes 2,14 Total Q factor Qts 1,27 Equivalent volume Vas 2,1 l Effective piston area Sd 50 cm2 Dynamically moved mass Mms 5 g Force factor Bxl 2,75 T m Inductance of the voice coil L 0,3 mH Protective system IP 65 Heat resistance −40 ... 80 °C Colour schwarz / black