2.5" (66 mm) Waterproof Voice Speaker, 45 Ohm

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This all-weather speaker is ideal for outdoor and indoor applications. It is often used in entry intercoms and easily fits into small enclosures and tight spaces. Its Alnico V, HE+ magnet helps deliver high levels of clear communication. Its mylar cone design helps prevent moisture absorption, especially useful in high humidity. This speaker is not only ideal for intercom, it would be a great replacement speaker (standard hole placement) for radios, TVs, signaling and alarm devices.

  • Voice range speaker
  • 2.5" (66 mm) basket diameter
  • 0.5 watts, 45 ohms, 87 dB SPL
  • 0.6" copper voice coil, paper former
  • Alnico magnet, stamped steel basket
  • Mylar cone & surround

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More Information
Brand Name MISCO OEM
Speaker Type Voice
Shape of Speaker Square
Size, Nominal (inch & mm) 2" (50 mm)
Environment Outdoor / Indoor
Application Drive-Thru / Kiosk, Medical, Outdoor , Signal / Alarm Systems, Voice Communications
RoHS Compliant Yes
Rated Impedance (Ω) 45
Rated Power IEC268-5 (W) 0.5 Watts
Program Power (W) 1
Sensitivity (dB SPL) ¹ 87
Frequency Range (Hz) 350 - 9,000
DC Resistance (Re) (Ω) 43.1
Resonant Frequency (Fs) (Hz) 350
Nominal Impedance (Z) (Ω) 45
Voice Coil Inductance (Le) (mH) -
Mechanical Q Factor (Qms) 4.80
Electrical Q Factor (Qes) 11.76
Total Q Factor (Qts) 3.43
Basket Type Stamped steel with zinc plating
Terminal Size (mm) 2.8 x 0.5
Voice Coil Diameter (mm) 15.2
Voice Coil Wire Material Copper
Voice Coil Former Material Paper
Magnet Material Alnico
Magnet Weight (g) 10
Cone Body Material Mylar
Cone Surround Material Mylar
Spider Material Cloth
Dust Cap Material Mylar
Net Weight (kg) 0.05
Technical Notes

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