W 250 S - 4 Ohm

Art. No. 9034

25 cm (10") HiFi woofer with strong drive, extended rear pole plate and 38 mm voice-coil for high power handling. Elastic rubber surround, coated paper cone and magnet vent.

Recommended cabinets:

Volume/Principle BR-Channel fb 50 l/bass reflex 2 x BR 15.34 43 Hz 70 l/bass reflex 2 x BR 15.34 39 Hz 1 x BR 25.50 (length 7 cm) 100 l/bass reflex 2 x BR 15.34 (length 10 cm) 34 Hz

Volume/Principle BR-Channel fb
50 l/bass reflex 2 x BR 15.34 43 Hz
70 l/bass reflex 2 x BR 15.34 39 Hz
1 x BR 25.50 (length 7 cm)
100 l/bass reflex 2 x BR 15.34 (length 10 cm) 34 Hz

Technical Data

Rated power
100 W
Maximum power
150 W
Nominal impedance Z
4 Ohm
Frequency response
fu–5500 Hz
(fu: Lower cut-off frequency depending on cabinet)
.
Mean sound pressure level
90 dB (1 W/1 m)
Excursion limit
+/−7 mm
Resonance frequency fs
33 Hz
Magnetic induction
1.0 T
Magnetic flux
835 µWb
Height of front pole-plate
7 mm
Voice coil diameter
38 mm
Height of winding
17 mm
Cutout diameter
233 mm
Net weight
3 kg
D.C. resistance Rdc
3.6 Ohm
Mechanical Q factor Qms
2.01
Electrical Q factor Qes
0.43
Total Q factor Qts
0.35
Equivalent volume Vas
135 l
Effective piston area Sd
346 cm²
Dynamically moved mass Mms
32 g
Force factor Bxl
8.9 Tm
Inductance of the voice coil L
0.9 mH
Frequency- and impedance response