2.25 Inch (57 mm) 3 Ohm Waterproof Alarm Speaker

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Built to Order

Elevate your aviation experience with MISCO's all-weather, sealed alarm speaker - the pinnacle of audio innovation. Designed specifically for aircraft chime systems, this speaker boasts a peak performance frequency range of 900-7000 Hz, delivering an unyielding clarity that cuts through even the most demanding airborne environment. Its advanced moisture-deflecting acrylic-treated cloth cone, self-enclosed Alnico magnet, and rugged steel frame ensure reliable audio performance, even in high humidity and all weather conditions.

  • Peak performance frequency range of 900-7000 Hz for exceptional audio clarity
  • Moisture-deflecting acrylic-treated cloth cone for high humidity resistance
  • Self-enclosed Alnico magnet and rugged steel frame for durability
  • All-weather design for reliable performance in any conditions
  • Specifically designed for aircraft chime systems

MISCO engineers use the world's most sophisticated loudspeaker measurement systems, including the Klippel Analyzer, to maximize and confirm the speaker's design and the Klippel QC module to ensure perfect unit-to-unit consistency and reliability. 

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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) +/- 15% 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