8 Inch (203 mm), 8 Ohm Coaxial Speaker with 3" Tweeter

Brand Name
Oaktron by MISCO
Model #
Part #
In stock

The OK83 is a high performacnce coaxial speaker with a mounted tweeter for full-range sound. Audio from this model achieves high dispersion within higher frequencies for speech and music—a perfect choice for paging systems, public communications, and background music applications.

  • Coaxial speaker
  • 8" (203 mm) stamped steel basket
  • 3" (77 mm) tweeter
  • 20 watts, 8 ohm, 97 dB SPL
  • 1" copper voice coil, aluminum former
  • Paper cone, ferrite magnet

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More Information
Brand Name Oaktron by MISCO
Model # OK83
Size, Nominal (inch & mm) 8" (203 mm)
Shape of Speaker Round
Speaker Type Coaxial
Application Commercial, Indoor, Voice Communications
Environment Indoor
RoHS Compliant Yes
Nominal Impedance (Z) (Ω) 8
Rated Power IEC268-5 (W) 20 Watts
Rated Impedance (Ω) 8
Continuous Power (W) 20
Program Power (W) 40
Frequency Range (Hz) 57 - 14,000
Sensitivity (dB SPL) ¹ 97
Resonant Frequency (Fs) (Hz) +/- 15% 93
DC Resistance (Re) (Ω) 7.6
Voice Coil Inductance (Le) (mH) 0.24
Mechanical Q Factor (Qms) 5.94
Electrical Q Factor (Qes) 1.0
Total Q Factor (Qts) 0.86
Mechanical Resistance (Rms) (kg/s) 0.98
Compliance Equivalent Volume (Vas) (L) 15.5
Suspension Compliance (Cms) (mm/N) 0.23
Surface Area of Diaphragm (Sd) (cm²) 219.0
Moving Mass (Mms) (gm) 7.70
Maximum Linear Excursion (Xmax) (mm) 0.6
Motor Force Factor (BL) (T•M) 6.6
Efficiency (η₀) (%) 2.6
Efficiency Bandwidth Product (EBP) (Fs/Qes) 199.64
Basket Type Stamped steel
Terminal Size (mm) 4.8 x 0.5
Voice Coil Diameter (mm) 25.4
Voice Coil Wire Material Copper
Voice Coil Former Material Aluminum
Voice Coil Winding Single Layer
Magnet Material Ferrite
Magnet Weight (g) 340
Cone Body Material Paper
Dust Cap Material Felt
Spider Material Cotton
Net Weight (kg) 1.36
Technical Notes


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