W 250 NG 4 OHM

25 cm (10") woofer with air-dried cone and cone reinforcement. Very good price/performance ratio. Suitable for simple 2- and 3-way systems, subwoofers and car rear tray applications.

No longer available.

Technical Data

Rated power
80 Watt
Maximum power
120 Watt
Nominal impedance Z
4 Ohm
Frequency response
fu - 6000 Hz
(fu: Lower cut-off frequency depending on cabinet)
.
Mean sound pressure level
90 dB (1W/1m)
Excursion limit
18 mm
Resonance frequency fs
37 Hz
Magnetic induction
0.9 Tesla
Magnetic flux
560 µ Weber
Height of front pole-plate
6 mm
Voice coil diameter
3.3 cm
Height of winding
1 cm
Cutout diameter
23.3 cm
Net weight
1.5 kg
D.C. resistance Rdc
3.7 Ohm
Mechanical Q factor Qms
4.3
Electrical Q factor Qes
1.1
Total Q factor Qts
0.87
Equivalent volume Vas
120 l
Effective piston area Sd
360 cm2
Dynamically moved mass Mms
27 g
Force factor Bxl
4.8 T · m
Inductance of the voice coil L
0.6 mH
Frequency- and impedance response