3" (77 mm) Square RoHS Waterproof Voice Range Speaker

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The RDC3WI is a voice range speaker designed for outdoor / indoor voice communications in intercom or drive-thru applications. This model features a four-hole mount design for ease of front or rear flush mounting, as well as an acrylic-treated cloth cone to provide additional years of projected life. Ideal for intercoms, and serves as a reliable replacement speaker for radios, TVs, signaling, and alarm devices.

  • Voice range speaker
  • 3" (77 mm) steel basket diameter
  • 4 watts, 8 ohm, 87 dB SPL
  • 0.56" copper voice coil, Kapton former
  • Acrylic-treated cone and edge
  • Ferrite magnet


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More Information
Brand Name MISCO OEM
Speaker Type Voice
Shape of Speaker Square
Size, Nominal (inch & mm) 3" (77 mm)
Environment Outdoor / Indoor
Application Drive-Thru / Kiosk, Indoor, Medical, Military, Outdoor , Signal / Alarm Systems, Transit, Voice Communications
RoHS Compliant Yes
Rated Impedance (Ω) 8
Rated Power IEC268-5 (W) 4 Watts
Program Power (W) 8
Sensitivity (dB SPL) ¹ 87
Frequency Range (Hz) 300 - 7,000
Resonant Frequency (Fs) (Hz) 357
Nominal Impedance (Z) (Ω) 8
Voice Coil Inductance (Le) (mH) 0.6
Mechanical Q Factor (Qms) 11.3
Electrical Q Factor (Qes) 2.62
Total Q Factor (Qts) 2.13
Basket Type Stamped steel
Terminal Size (mm) 4.8 x 0.5
Voice Coil Diameter (mm) 17.8
Voice Coil Wire Material Copper
Voice Coil Former Material Kapton, Polyimide film
Magnet Material Ferrite
Magnet Weight (g) 68
Cone Body Material Acrylic treated textile
Cone Surround Material Acrylic treated textile
Spider Material Phenolic treated textile
Dust Cap Material Treated felt