4 Inch (104 mm) Flame-Retardant Voice Range Speaker

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The 77012 (EEN4FR-8A) is a light-weight, efficient, and reliable audio solution for voice range sound within aerospace interior cabins. An aluminum basket and neodymium magnet reduces this speaker’s weight from the more common stamped-steel basket. The wire harness connects with a 4-40 screw terminals for a strong mechanical connection without solder. 

  • Flame retardant, voice range speaker
  • 4" (104 mm) aluminum basket diameter
  • 5 watts, 8 ohm, 90 dB SPL
  • 0.75" aluminum voice coil, polyimide film former
  • Neodymium magnet

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More Information
Brand Name MISCO OEM
Size, Nominal (inch & mm) 4" (100 mm)
Shape of Speaker Square
Speaker Type Voice
Application Aerospace, Indoor, Voice Communications
Environment Indoor
RoHS Compliant No
Nominal Impedance (Z) (Ω) 8
Rated Power IEC268-5 (W) 5 Watts
Rated Impedance (Ω) 8
Program Power (W) 15
Frequency Range (Hz) 200 - 6,000
Sensitivity (dB SPL) ¹ 90
Resonant Frequency (Fs) (Hz) +/- 15% 170
DC Resistance (Re) (Ω) 7.4
Total Q Factor (Qts) 0.83
Basket Type Black Powder Coat Stamped Aluminum
Terminal Size (mm) 4.7 x 0.5
Voice Coil Diameter (mm) 14.5
Voice Coil Wire Material Aluminum
Voice Coil Former Material Polyimide Film
Voice Coil Winding Single Layer
Magnet Material Neodymium
Magnet Weight (g) 22.68
Cone Body Material Flame Retardant Paper Composite
Cone Surround Material Flame Retardant Cloth
Dust Cap Material Flame Retardant Paper Composite
Net Weight (kg) 0.1
Technical Notes

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