4 Inch (100 mm) 8 Ohm Coaxial Speaker

Brand Name
Oaktron by MISCO
Model #
Part #
In stock

The 93072 is a powerful 4 in. extended range 8 ohm speaker with a coaxially mounted PEI dome tweeter, along with a sleek titanium electroplated polypropylene cone. This model can work equally well installed in sealed or vented enclosures.  This speaker is ideal for music systems such as those in vehicles or arcade consoles.

  • Extended range music and voice speaker
  • 4 in. (100 mm) steel basket diameter
  • 15 watt, 8 ohm, 88 dB SPL
  • 1 in. copper voice coil, Kapton former
  • PEI dome tweeter, coaxially mounted
  • Titanium electroplated polypropylene cone

MISCO engineers test and analyze the performance of these speakers using the world's most sophisticated loudspeaker measurement systems, including the Klippel Analyzer and the Klippel QC, which confirm the final design.  

Download Product Specifications (PDF) »

More Information
Brand Name Oaktron by MISCO
Model # 100-CX08-01
Size, Nominal (inch & mm) 4" (100 mm)
Shape of Speaker Square
Speaker Type Coaxial
RoHS Compliant Yes
Nominal Impedance (Z) (Ω) 8
Rated Power IEC268-5 (W) 15 Watts
Rated Impedance (Ω) 8
Program Power (W) 30
Frequency Range (Hz) 60 - 20,000
Sensitivity (dB SPL) ¹ 88
Resonant Frequency (Fs) (Hz) +/- 15% 110
DC Resistance (Re) (Ω) 6.9
Voice Coil Inductance (Le) (mH) 0.29
Mechanical Q Factor (Qms) 3.72
Electrical Q Factor (Qes) 0.74
Total Q Factor (Qts) 0.62
Mechanical Resistance (Rms) (kg/s) 1.06
Compliance Equivalent Volume (Vas) (L) 1.45
Suspension Compliance (Cms) (mm/N) 0.37
Surface Area of Diaphragm (Sd) (cm²) 52.81
Moving Mass (Mms) (gm) 5.67
Motor Force Factor (BL) (T•M) 6.0
Efficiency (η₀) (%) 0.25
Efficiency Bandwidth Product (EBP) (Fs/Qes) 148.25
Basket Type Stamped steel
Terminal Size (mm) 5.2 x 0.5 / 2.8 x 0.5
Voice Coil Diameter (mm) 25.781
Voice Coil Wire Material High temperature copper
Voice Coil Former Material Kapton
Voice Coil Winding Single Layer
Magnet Material Ferrite
Magnet Weight (g) 283.5
Cone Body Material Titanium electroplated polypropylene
Cone Surround Material Natural rubber
Dust Cap Material Felt
Spider Material Cotton
Net Weight (kg) 0.84
Technical Notes

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