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

Brand Name
MISCO OEM
Part #
66SA45M
Built to Order
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THIS IS A “BUILT TO ORDER” PRODUCT

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.

  • Alnico V Plus, High Energy Plus Magnet (HE+)
  • 1 watt, Program Power
  • Steel basket construction
  • High tensile strength polyester film (PET) cone & dust cap
  • Robust, copper-wound, 0.6 inch voice coil

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.

Download Product Specifications (PDF) »

More Information
Brand Name MISCO OEM
Speaker Type Voice
Shape of Speaker Square
Size, Nominal (inch & mm) 2.5" (66 mm)
Environment Outdoor / Indoor
Application Kiosk, Medical, Outdoor , Signal / Alarm Systems, Transit, Voice Communications
RoHS Compliant Yes
PRIMARY SPECIFICATIONS
Rated impedance (Ω) 45
Rated Power IEC268-5 (W) 0.5 Watts
Power, Program (W) 1
Sensitivity (dB SPL) ¹ 87
Frequency range (Hz) 350 - 9,000
SMALL SIGNAL PARAMETERS
DC resistance (Re) (Ω) 43.1
Resonant Frequency (Fs) (Hz) 350
Nominal Impedance (Z) (Ω) 45
Voice Coil Inductance (Le) (mH) 0
Mechanical Q factor (Qms) 4.8
Electrical Q Factor (Qes) 11.76
Total Q factor (Qts) 3.43
MATERIAL DESCRIPTIONS
Basket type Stamped Steel with zinc plating
Terminal size 2.8 x 0.5 (0.12" x 0.02")
Voice coil diameter (mm) 15.2 (0.60")
Voice coil wire material Copper
Voice coil former material Paper
Magnet Material Alnico V
Magnet weight (gm) 10 (0.4 ounces)
Cone body material Polyester (PET)
Cone surround material Polyester (PET)
Spider Material Cloth
Dust cap material Polyester (PET)
Net weight (kg) .050
Technical Notes

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