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

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Introducing the 66SA45M Waterproof Voice Speaker - your reliable companion that can withstand any weather condition and deliver quality sound. This versatile powerhouse is perfect for indoor and outdoor settings and is particularly useful in entry intercoms and compact environments. 

The speaker is equipped with an Alnico V, HE+ magnet, producing superior voice clarity, ideal for delivering vital messages. Its mylar cone has been specially treated to repel moisture, making it indispensable in high-humidity environments. 

With standard hole placement, this speaker can be easily used as a replacement for various devices, ensuring that your message is heard loud and clear. Its waterproof feature makes it perfect for any weather, giving you peace of mind that your communication is consistent and reliable. 

  • Superior voice clarity with Alnico V, HE+ magnet
  • Specially treated mylar cone repels moisture in high-humidity environments
  • Standard hole placement for easy replacement of various devices
  • Waterproof design for use in any weather condition

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 Voice
Shape of Speaker Square
Size, Nominal (inch & mm) 2" (50 mm)
Environment Outdoor / Indoor
Application Medical, Outdoor , 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) +/- 15% 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