FR 87 - 4 Ohm

Art. No. 4630

8.7 cm (3.4") fullrange speaker with balanced frequency response and high efficiency. For speech and music reproduction in electronic divices and vehicles.

Typical applications
Monitoring speaker for electronic devices
Vehicles
Electronic musical instruments
Attributes
  • Moisturised cone
  • Metal basket

Technical Data

Rated power
15 W
Maximum power
20 W
Nominal impedance Z
4 Ohm
Frequency response
100–20000 Hz
Mean sound pressure level
85 dB (1 W/1 m)
Opening angle (-6 dB)
143°/4000 Hz
Excursion limit
+/−2 mm
Resonance frequency fs
137 Hz
Height of front pole-plate
3 mm
Voice coil diameter
15 mm
Height of winding
4.3 mm
Cutout diameter
80 mm
Net weight
0.21 kg
D.C. resistance Rdc
3.5 Ohm
Mechanical Q factor Qms
6.4
Electrical Q factor Qes
1.56
Total Q factor Qts
1.25
Equivalent volume Vas
1.3 l
Effective piston area Sd
37 cm²
Dynamically moved mass Mms
2 g
Force factor Bxl
2.1 Tm
Inductance of the voice coil L
0.2 mH
Connections
4.8 x 0.8 mm (+)2.8 x 0.8 mm (−)
Temperature range
–25 ... 70 °C
Frequency- and impedance response
Directivity pattern