W 170 4 OHM

17 cm (6.5") HiFi woofer with very good price/performance ratio. Suitable for simple 2-way speakers and car rear tray systems. Especially suited als replacement driver for many HiFi speakers.

No longer available.

Technical Data

Rated power
40 W
Maximum power
70 W
Nominal impedance Z
4 Ohm
Frequency response
fu–6000 Hz
(fu: Lower cut-off frequency depending on cabinet)
Mean sound pressure level
87 dB (1 W/1 m)
Excursion limit
15 mm
Resonance frequency fs
68 Hz
Magnetic induction
1.0 T
Magnetic flux
240 µWb
Height of front pole-plate
3 mm
Voice coil diameter
25 mm
Height of winding
7 mm
Cutout diameter
143 mm
Net weight
0.77 kg
D.C. resistance Rdc
3.7 Ohm
Mechanical Q factor Qms
Electrical Q factor Qes
Total Q factor Qts
Equivalent volume Vas
17.3 l
Effective piston area Sd
137 cm²
Dynamically moved mass Mms
8.3 g
Force factor Bxl
3.7 T m
Inductance of the voice coil L
0.47 mH
Frequency- and impedance response