4 Inch (100 mm) 8 Ohm, Voice Range Aerospace Speaker

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The 4C8CFR is a 4" voice range speaker designed for aerospace applications. This driver uses a high-power alnico magnet and is fungus-resistant and flame retardant to meet the requirements of Federal Air Regulation Part 25 Section 25.853. Ideal for shallow enclosures.

  • Voice range speaker
  • 4" (100 mm) steel basket diameter
  • 10 watt, 8 ohm, 86 dB SPL
  • 0.75" copper voice coil, aluminum former
  • Alnico magnet, flame retardant paper cone
More Information
Brand Name MISCO OEM
Speaker Type Voice
Shape of Speaker Square
Size, Nominal (inch & mm) 4" (100 mm)
Environment Indoor
Application Aerospace, Indoor, Voice Communications
RoHS Compliant No
Rated Impedance (Ω) 8
Rated Power IEC268-5 (W) 10 Watts
Program Power (W) 20
Sensitivity (dB SPL) ¹ 86
Frequency Range (Hz) 250 - 8,000
DC Resistance (Re) (Ω) 7.2
Resonant Frequency (Fs) (Hz) +/- 15% 310
Nominal Impedance (Z) (Ω) 8
Basket Type Stamped steel
Terminal Size (mm) 4.7 x 0.5
Voice Coil Diameter (mm) 20.3
Voice Coil Wire Material Copper
Voice Coil Former Material Aluminum
Magnet Material Alnico
Magnet Weight (g) 27.8
Cone Body Material Flame retardant paper fiber
Spider Material Cotton
Dust Cap Material Felted cloth
Technical Notes

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