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WS 20 E - 4 Ohm

Art. No. 1057

20 cm (8") HiFi woofer with polypropylene cone. Due to balanced frequency response curve suitable as low-midrange driver for large 4-way speaker systems. Due to the special basket design suitable as replacement driver for many HiFi speakers.

*Gross price for private customers. Industrial prices are available on request.
Technical Data
Amplitude & Impedance Frequency
Directivity pattern
Rated power 80 W
Maximum power 120 W
Nominal impedance Z 4 Ohm
Frequency response fu–7000 Hz
(fu: Lower cut-off frequency depending on cabinet) .
Mean sound pressure level 88 dB (1 W/1 m)
Opening angle (-6 dB) 67°/4000 Hz
Excursion limit +/−6 mm
Resonance frequency fs 47 Hz
Magnetic induction 0.85 T
Magnetic flux 400 µWb
Height of front pole-plate 5 mm
Voice coil diameter 30 mm
Height of winding 11 mm
Cutout diameter 186 mm
Net weight 1.3 kg
D.C. resistance Rdc 3.3 Ohm
Mechanical Q factor Qms 5.56
Electrical Q factor Qes 1.44
Total Q factor Qts 1.14
Equivalent volume Vas 39 l
Effective piston area Sd 240 cm²
Dynamically moved mass Mms 23 g
Force factor Bxl 4.5 T m
Inductance of the voice coil L 0.7 mH
Connections 5.2 x 0.8 mm (+)/2.8 x 0.8 mm (-)
Protective system IP 65

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