4 Inch, Wide Range, Flame Retardant Aerospace Speaker

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This ultra-lightweight, flame-retardant speaker is designed for a 70-volt paging system in aircraft.  Rather than a heavy transformer, the design utilizes a high-impedance voice coil along with resistors to allow multiple power taps. It's an ideal solution for high-intelligibility communications and in applications where weight and space must be minimized.  

  • 4, 2, 1, and ½ Watt taps for 70.7V system
  • Maximum Energy (ME) neodymium magnet
  • Flame-retardant (FR) cone
  • Aluminum VC form
  • 8 Watts, Program Power

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More Information
Brand Name MISCO OEM
Speaker Type Wide Range
Shape of Speaker Square
Size, Nominal (inch & mm) 4" (100 mm)
Environment Indoor
Application Aerospace, Voice Communications
RoHS Compliant No
Rated Impedance (Ω) 1075
Rated Power IEC268-5 (W) 4 Watts
Program Power (W) 8
Sensitivity (dB SPL) ¹ 90
Frequency Range (Hz) 200 - 6,000
DC Resistance (Re) (Ω) 1075
Resonant Frequency (Fs) (Hz) +/- 15% 250
Nominal Impedance (Z) (Ω) 1000
Voice Coil Inductance (Le) (mH) 0
Total Q Factor (Qts) 0.83
Basket Type Stamped Aluminum, powder coat black
Terminal Size (mm) 2.8 mm x 0.5 mm
Voice Coil Diameter (mm) 20.3
Voice Coil Wire Material Copper
Voice Coil Former Material Aluminium
Magnet Material Neodymium
Magnet Weight (g) 12
Cone Body Material Flame Retardant Paper
Cone Surround Material Flame Retardant Paper
Spider Material Flame Retardant cloth
Dust Cap Material Flame Retardant Paper
Technical Notes

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