FR 13 8 OHM

13 cm (5") full-range loudspeaker with an inverted cone. Uniform frequency response and powerful low-frequency output. Simple installation e.g. in vehicles with loudspeaker mounts for 13 cm loudspeakers.

Typical applications:

  • Built into cars, busses or trains
  • Electronic musical instruments
  • Monitoring speaker for electronic devices

No longer available.

Technical Data

Rated power
30 W
Maximum power
50 W
Nominal impedance Z
8 Ohm
Frequency response
65–20000 Hz
Mean sound pressure level
88 dB (1 W/1 m)
Excursion limit
5 mm
Resonance frequency fs
100 Hz
Magnetic induction
0.85 T
Magnetic flux
160 µWb
Height of front pole-plate
3 mm
Voice coil diameter
20 mm
Height of winding
6 mm
Cutout diameter
116 mm
Net weight
0.29 kg
D.C. resistance Rdc
6.5 Ohm
Mechanical Q factor Qms
5.06
Electrical Q factor Qes
2.13
Total Q factor Qts
1.5
Equivalent volume Vas
5.9 l
Effective piston area Sd
87 cm²
Dynamically moved mass Mms
4.5 g
Force factor Bxl
2.8 T m
Inductance of the voice coil L
0.4 mH
Temperature range
−25 ... 100 °C
Frequency- and impedance response
Directivity pattern