VISATON WS 20 E 4 OHM

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.

Technical Data:
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 (−)