2.25" (57 mm) 3 Ohm Waterproof Alarm Speaker

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This all-weather, airtight sealed alarm speaker provides peaked frequencies intended for use in aircraft chime systems. High sensitivity audio from 900-7000 Hz, an acrylic treated cloth cone and surround to keep out moisture, a self-enclosed alnico magnet, and a rugged steel frame makes this the ideal solution for systems in need of reliable audio in any airborne environment.

  • Signal/Alarm Speaker
  • 2.25" (57 mm) steel basket frame
  • 3 ohm, 3 watts, 95 dB SPL
  • 0.5 oz. self enclosed alnico magnet
  • Acrylic treated cloth cone and surround

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More Information
Brand Name MISCO OEM
Speaker Type Alarm
Shape of Speaker Round
Size, Nominal (inch & mm) 2" (50 mm)
Environment Outdoor
Application Aerospace, Signal / Alarm Systems
Rated Impedance (Ω) 3
Rated Power IEC268-5 (W) 3 Watts
Program Power (W) 5
Sensitivity (dB SPL) ¹ 95
Frequency Range (Hz) 900 - 7,000
DC Resistance (Re) (Ω) 2.7
Resonant Frequency (Fs) (Hz) 1150
Nominal Impedance (Z) (Ω) 3
Voice Coil Inductance (Le) (mH) 2.7
Basket Type Steel
Terminal Size (mm) 2.8 x 0.5
Voice Coil Diameter (mm) 14.5
Voice Coil Wire Material Copper
Voice Coil Former Material Aluminum
Magnet Material Alnico
Magnet Weight (g) 15
Cone Body Material Acrylic treated cloth
Cone Surround Material Acrylic treated cloth
Dust Cap Material Acrylic treated cloth
Net Weight (kg) 0.05
Technical Notes

¹ Sensitivity is measured with 2.83 volt input, measured on-axis at 1 meter distance