FR 10 - 4 Ohm

Art. No. 2020

10 cm (4") fullrange speaker with good bass reproduction, balanced frequency response and high efficiency. Especially suitable as built-in speaker for music reproduction and as driver for 100 V network column speakers.

Typical applications
Network column speakers
Ceiling- mounted speakers in railway carriages and busses
Built-in car hi-fi speakers
Electronic musical instruments

Technical Data

Rated power
30 W
Maximum power
50 W
Nominal impedance Z
4 Ohm
Frequency response
80–20000 Hz
Mean sound pressure level
86 dB (1 W/1 m)
Opening angle (-6 dB)
113°/4000 Hz
Excursion limit
+/−4 mm
Resonance frequency fs
90 Hz
Magnetic induction
0.95 T
Magnetic flux
180 µWb
Height of front pole-plate
3 mm
Voice coil diameter
20 mm
Height of winding
6 mm
Cutout diameter
100 mm
Net weight
0.38 kg
D.C. resistance Rdc
3.2 Ohm
Mechanical Q factor Qms
Electrical Q factor Qes
Total Q factor Qts
Equivalent volume Vas
2.3 l
Effective piston area Sd
50 cm²
Dynamically moved mass Mms
5.7 g
Force factor Bxl
4.6 T m
Inductance of the voice coil L
0.2 mH
5.2 x 0.5 mm (+)2.8 x 0.5 mm (−)
Temperature range
–25 ... 70 °C
Frequency- and impedance response
Directivity pattern