FR 8 WP - 4 Ohm (black)

Art. No. 2148

Saltwater resistant 8 cm (3.3") full-range speaker with moulded plastic cone, plastic basket and grille. Absolutely corrosion-resistant and waterproof due to encased magnet and silicon-coated leads. Clear-cut high-range output.

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

Typical applications
Outdoor PA systems
Loudspeaker for solariums and damp
Boats, ships and open vehicles
  • Seawater proof
  • Functionally at low temperature according to EN 60068-2-1 (-40 °C; 96 h)
  • Up to the standards of the Germanischer Lloyd (requirements for electrical equipment/low temperature)
  • Plastic: ASA (UL 94:HB; UV-/weather-proof)
  • Ball-resistant

Technical Data

Rated power
15 W
Maximum power
25 W
Nominal impedance Z
4 Ohm
Frequency response
100–20000 Hz
Mean sound pressure level
84 dB (1 W/1 m)
Opening angle (-6 dB)
114°/4000 Hz
Excursion limit
+/−3 mm
Resonance frequency fs
158 Hz
Magnetic induction
1 T
Magnetic flux
190 µWb
Height of front pole-plate
3 mm
Voice coil diameter
20 mm
Height of winding
4 mm
Cutout diameter
74 mm
Net weight
0.23 kg
D.C. resistance Rdc
4.1 Ohm
Mechanical Q factor Qms
Electrical Q factor Qes
Total Q factor Qts
Equivalent volume Vas
0.4 l
Effective piston area Sd
30 cm²
Dynamically moved mass Mms
2.9 g
Force factor Bxl
2.8 T m
Inductance of the voice coil L
0.3 mH
schwarz / black
5.2 x 0.5 mm (+)2.8 x 0.5 mm (−)
Protective system
IP 65 *)
Temperature range
−40 ... 80 °C
Frequency- and impedance response
Directivity pattern