R 10 SC - 4 Ohm

Art. No. 2040

Magnetically shielded 10 cm (4") fullrange speaker with high efficiency, balanced frequency response. Water-repellent cone and rubber gasket. Especially suitable as control speaker in electronic devices and as speaker for public applications and public transport systems.

*) IP protection class for front side when built into a sealed enclosure

Typical applications
Video monitoring screens
Monitoring speaker for electronic devices
Ceiling- mounted speakers in railway carriages and busses
  • Functionally at cold according to EN 60068-2-1/EN 50155
  • Cold storage (-40 °C) according to EN 60068-2-1/EN 50155
  • Functionally at damp heat (cyclic) according to EN 60068-2-3/EN 50155
  • Functionally at dry heat according to EN 60068-2-2/EN 50155

Technical Data

Rated power
20 W
Maximum power
30 W
Nominal impedance Z
4 Ohm
Frequency response
100–13000 Hz
Mean sound pressure level
90 dB (1 W/1 m)
Opening angle (-6 dB)
92°/4000 Hz
Excursion limit
+/−1.5 mm
Resonance frequency fs
165 Hz
Magnetic induction
0.95 T
Magnetic flux
135 µWb
Height of front pole-plate
3 mm
Voice coil diameter
15 mm
Height of winding
4 mm
Cutout diameter
93 mm
Net weight
0.24 kg
D.C. resistance Rdc
3.6 Ohm
Mechanical Q factor Qms
Electrical Q factor Qes
Total Q factor Qts
Equivalent volume Vas
2.6 l
Effective piston area Sd
56 cm²
Dynamically moved mass Mms
1.9 g
Force factor Bxl
2 T m
Inductance of the voice coil L
0.2 mH
5.2 x 0.5 mm (+)
2.8 x 0.5 mm (−)
Protective system
IP 64
IP 67 *)
Temperature range
−40 ... 70 °C
Frequency- and impedance response
Directivity pattern