4 Inch Mil-Spec, Voice Communication Speaker

Brand Name
Oaktron by MISCO
Part #
In stock

This 4-inch mil-spec voice communication speaker is an exceptional audio component engineered to meet the demanding requirements of military communications. 

Crafted from die-cast aluminum, this speaker carries an NSN number 5965-008-923665 and conforms to the rigorous MIL-DTL-12606 standards. The phenolic-impregnated cone and dust cap ensure durability in the toughest conditions, while the meta-aramid laminate voice coil form can withstand extreme heat. The separate rubber gasket and steel front screen enhance the speaker's robustness.

With its exceptional design, the LS445/U speaker is engineered to perform excellently in the harshest environments, including the jolts of a combat tank and the persistent vibrations aboard a C-5M Super Galaxy. 

  • Precisely engineered to meet military communication requirements
  • Die-cast aluminum construction for superior durability
  • MIL-DTL-12606 standards compliant
  • Phenolic-impregnated cone and dust cap for added robustness
  • Meta-aramid laminate voice coil form withstands extreme heat
  • Separate rubber gasket and steel front screen included for added protection
  • Excellent performance in harsh environments

MISCO engineers use the world's most sophisticated loudspeaker measurement systems, including the Klippel Analyzer, to maximize and confirm the speaker's design and the Klippel QC module to ensure perfect unit-to-unit consistency and reliability. 

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More Information
Brand Name Oaktron by MISCO
Size, Nominal (inch & mm) 4" (100 mm)
Shape of Speaker Square
Speaker Type Voice
Application Military, Outdoor , Voice Communications
Environment Outdoor / Indoor
RoHS Compliant No
Nominal Impedance (Z) (Ω) 8
Rated Power IEC268-5 (W) 2 Watts
Rated Impedance (Ω) 8
Program Power (W) 2
Frequency Range (Hz) 300 - 7,000
Sensitivity (dB SPL) ¹ 91
Resonant Frequency (Fs) (Hz) +/- 15% 590
DC Resistance (Re) (Ω) 7.0
Voice Coil Inductance (Le) (mH) 0
Total Q Factor (Qts) 0.83
Basket Type Cast aluminum
Terminal Size (mm) 0.152" x 0.025"
Voice Coil Diameter (mm) 0.73" / 18.5mm
Voice Coil Wire Material Copper
Voice Coil Former Material Meta-aramid laminate
Voice Coil Winding Single Layer
Magnet Material Barium ferrite
Magnet Weight (g) 156
Cone Body Material Cloth impregnated with phenolic resin
Cone Surround Material Cloth impregnated with phenolic resin
Dust Cap Material Cloth impregnated with phenolic resin
Spider Material Cloth impregnated with phenolic resin
Net Weight (kg) 0.56
Technical Notes

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