1 Inch (31 mm), 8 Ohm Wide Range Speaker

Brand Name
Oaktron by MISCO
Model #
Part #
In stock

A compact one-inch, bottle-cap-sized driver for voice communication and small radio applications. This model's neodymium magnet and black anodized aluminum cone create a clear, high-power sound without extra ringing. For tight-fitting applications, this speaker has a set of mounting holes to simplify and secure installation into cabinets, enclosures, and sound systems alike.

  • Wide range speaker
  • 1.2 inch (31 mm) basket diameter
  • 3 watts, 8 ohm, 76 dB SPL
  • 0.7 inch copper voice coil, paper former
  • Neodymium magnet, stamped steel basket
  • Anodized aluminum cone, NBR rubber surround


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More Information
Brand Name Oaktron by MISCO
Model # 31-FR08-01
Size, Nominal (inch & mm) 1" (25 mm)
Shape of Speaker Round
Speaker Type Wide Range
Application Indoor, Voice Communications
Environment Indoor
RoHS Compliant Yes
IP Rating IP67
Nominal Impedance (Z) (Ω) 8
Rated Power IEC268-5 (W) 3 Watts
Rated Impedance (Ω) 8
Continuous Power (W) 3
Program Power (W) 6
Frequency Range (Hz) 180 - 20,000
Sensitivity (dB SPL) ¹ 76
Resonant Frequency (Fs) (Hz) +/- 15% 180
DC Resistance (Re) (Ω) 7.54
Voice Coil Inductance (Le) (mH) 0.14
Mechanical Q Factor (Qms) 1.07
Electrical Q Factor (Qes) 0.95
Total Q Factor (Qts) 0.50
Mechanical Resistance (Rms) (kg/s) 0.72
Compliance Equivalent Volume (Vas) (L) 0.03
Suspension Compliance (Cms) (mm/N) 1.0
Surface Area of Diaphragm (Sd) (cm²) 4.91
Moving Mass (Mms) (gm) 0.6
Motor Force Factor (BL) (T•M) 2.48
Efficiency (η₀) (%) 0.03
Efficiency Bandwidth Product (EBP) (Fs/Qes) 189.9
Basket Type Stamped Steel with Zinc Plating
Terminal Size (mm) 3.6 x 0.5
Voice Coil Diameter (mm) 17.8
Voice Coil Wire Material Copper
Voice Coil Former Material Paper
Voice Coil Winding Single Layer
Magnet Material Neodymium
Magnet Weight (g) 8.22
Cone Body Material Black anodized aluminum
Cone Surround Material NBR rubber
Dust Cap Material Aluminum
Net Weight (kg) 0.03
Technical Notes

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