3" x 5" (77 mm x 127 mm) 8 Ohm, Wide Range Speaker

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High intelligibility for your two-way radio systems! The 93088 wide range speaker driver delivers the clear sound you need for any trusted communications application, sporting a design to emit strong voice fundamentals, and a high-energy neodymium magnet to produce a powerful output. Fit this 3” x 5” driver into compact enclosures as well, thanks to a slim, oval shaped steel frame.

  • Wide Range Speaker
  • 3” x 5” (77 mm x 127 mm) Basket Diameter
  • Neodymium Magnet
  • Steel-Stamped
  • Half Roll Treated Cloth Surround
  • Solder Lug Terminals

Oaktron by MISCO is a premium line of high performance, ready-to-ship transducers and drivers for a wide variety of applications including high fidelity, arcade, and casino games, automotive, aerospace and many more. From elegantly simple to highly specialized designs for unique and demanding applications, there is an Oaktron loudspeaker perfectly suited for your needs.

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

Download Product Specifications (PDF) »

More Information
Model # 77X127-VB04-01
Size, Nominal (inch & mm) 3" x 5" (77 mm x 127 mm)
Shape of Speaker Oval
Speaker Type Wide Range Speaker
Application Voice Communications
Environment Indoor
RoHS Compliant Yes
Nominal Impedance (Z) (Ω) 4
Rated Power IEC268-5 (W) 15 Watts
Rated impedance (Ω) 4
Power, Continuous (W) 15
Power, Program (W) 30
Frequency range (Hz) 100 - 20k
Sensitivity (dB SPL) ¹ 90
Resonant Frequency (Fs) (Hz) 341
DC resistance (Re) (Ω) 3.11
Voice Coil Inductance (Le) (mH) 0.065
Mechanical Q factor (Qms) 3.087
Electrical Q Factor (Qes) 1.266
Total Q factor (Qts) 0.9
Mechanical Resistance (Rms) (kg/s) 1.613
Compliance equivalent volume (Vas) (L) 0.8123
Suspension Compliance (Cms) (mm/N) 0.139
Surface area of diaphragm (Sd) (cm²) 64.3
Moving mass (Mms) (gm) 3.443
Magnetic Gap Height (mm) 2.79
Coil winding height (mm) 4.85
Maximum linear excursion (Xmax) (mm) 1.03
Motor Force Factor (BL) (T•M) 3.499
Efficiency (η₀) (%) 0.752
Efficiency Bandwidth Product (EBP) (Fs/Qes) 181.6745656
Basket type Stamped Steel
Terminal size Solder Lugs
Voice coil diameter (mm) 19.3802
Voice coil wire material High Temperature Copper
Voice coil former material Aluminum
Voice Coil Winding 2 Layer, Round Wire
Magnet Material Neodymium
Magnet weight (gm) 11.6235
Cone body material Paper
Cone surround material Treated Cloth
Dust cap material Paper
Technical Notes

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