4 Inch (100 mm) Flame Retardant, Voice Range Speaker

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The DC4S-FR is a 4-inch voice range speaker for aerospace applications. It is equipped with a high-power ferrite magnet, a flame retardant cone, and surround, and fitted with quick-connect terminals for easy installation into small enclosures and systems.

  • Voice range speaker
  • 4 inch (100 mm) steel basket diameter
  • 6 watt, 8 ohm, 88 dB SPL
  • 0.6 inch copper voice coil, aluminum former
  • Ferrite magnet, flame retardant cone & surround

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More Information
Brand Name MISCO OEM
Speaker Type Voice
Shape of Speaker Square
Size, Nominal (inch & mm) 4" (100 mm)
Environment Indoor
Application Aerospace, Voice Communications
RoHS Compliant No
Rated Impedance (Ω) 8
Rated Power IEC268-5 (W) 6 Watts
Program Power (W) 12
Sensitivity (dB SPL) ¹ 88
Frequency Range (Hz) 140 - 9,000
DC Resistance (Re) (Ω) 6.3
Resonant Frequency (Fs) (Hz) +/- 15% 267
Nominal Impedance (Z) (Ω) 8
Voice Coil Inductance (Le) (mH) 0
Mechanical Q Factor (Qms) 5.9
Electrical Q Factor (Qes) 3.72
Total Q Factor (Qts) 2.29
Basket Type Stamped steel with zinc plating
Terminal Size (mm) 5.2 mm x 0.5 mm
Voice Coil Diameter (mm) 14.5
Voice Coil Wire Material Copper
Voice Coil Former Material Aluminum
Magnet Material Ferrite
Magnet Weight (g) 68
Cone Body Material Flame retardant paper
Cone Surround Material Flame retardant paper
Spider Material Flame retardant cloth
Dust Cap Material Flame retardant paper
Net Weight (kg) 0.25
Technical Notes

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