WS 13 BF 8 OHM

13 cm (5") HiFi low-midrange driver with 25 mm voice-coil, elastic rubber surround and coated paper cone. Due to balanced frequency response and high efficiency suitable as woofer and low-midrange driver.

No longer available.

Technical Data

Rated power
40 Watt
Maximum power
60 Watt
Nominal impedance Z
8 Ohm
Frequency response
fc - 6000 Hz
Mean sound pressure level
88 dB (1 W/1 m)
Excursion limit
16 mm
Resonance frequency fs
51 Hz
Magnetic induction
1 Tesla
Magnetic flux
390 µ Weber
Height of front pole-plate
5 mm
Voice coil diameter
2.5 cm
Height of winding
1.1 cm
Cutout diameter
13.1 cm
Net weight
0.7 kg
D.C. resistance Rdc
5.4 Ohm
Mechanical Q factor Qms
Electrical Q factor Qes
Total Q factor Qts
Equivalent volume Vas
12 l
Effective piston area Sd
85 cm2
Dynamically moved mass Mms
8 g
Force factor Bxl
5.2 T · m
Inductance of the voice coil L
0.76 mH
Frequency- and impedance response