4" (100 mm) Aerospace, Voice Range Speaker

Brand Name
MISCO OEM
Part #
EN4FR-1000A
Built to Order
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THIS IS A “BUILT TO ORDER” PRODUCT

This ultra-lightweight, flame-retardant speaker is designed to be used in 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.  

  • Flame-retardant to pass DO-160 testing.
  • 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

Download Product Specifications (PDF) »

More Information
Brand Name MISCO OEM
Speaker Type Wide Range Speaker
Shape of Speaker Square
Size, Nominal (inch & mm) 4" (100 mm)
Environment Indoor
Application Aerospace, Transit, Voice Communications
RoHS Compliant No
PRIMARY SPECIFICATIONS
Rated impedance (Ω) 1075
Rated Power IEC268-5 (W) 4 Watts
Power, Program (W) 8
Sensitivity (dB SPL) ¹ 92
Frequency range (Hz) 200 - 6000
SMALL SIGNAL PARAMETERS
DC resistance (Re) (Ω) 1075
Resonant Frequency (Fs) (Hz) 250
Nominal Impedance (Z) (Ω) 1000
Voice Coil Inductance (Le) (mH) 0
Total Q factor (Qts) 0.83
MATERIAL DESCRIPTIONS
Basket type Stamped Aluminum, powder coat black
Terminal size .2.8 x 0.5mm (0.205" x 0.02")
Voice coil diameter (mm) 20.3 (0.8")
Voice coil wire material Copper
Voice coil former material Aluminium
Magnet Material Neodymium
Magnet weight (gm) 12 (0.40 ounces)
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