Rated power15 W Maximum power 25 W Nominal impedance Z 4 Ohm Frequency response 100–20000 Hz Mean sound pressure level 84 dB (1 W/1 m) Resonance frequency fs 158 Hz Magnetic induction 1 T Magnetic flux 190 Wb Height of front pole-plate 3 mm Voice coil diameter 20 mm Height of winding 4 mm Cutout diameter 74 mm Net weight 0,23 kg D. C. resistance Rdc 4,1 Ohm Mechanical Q factor Qms 2,62 Electrical Q factor Qes 1,33 Total Q factor Qts 0,88 Equivalent volume Vas 0,4 l Effective piston area Sd 30 cm2 Dynamically moved mass Mms 2,9 g Force factor Bxl 2,8 T m Inductance of the voice coil L 0,3 mH Protective system IP 65 Heat resistance −40 ... 80 °C Colour schwarz / black