5.25 Inch (133 mm) 8 Ohm, Home Audio Woofer

Brand Name
Oaktron by MISCO
Model #
Part #
In stock

The Oaktron 93033 combines MISCO's industry leading woofer design with robust components and materials to bring your personal sound projects to life. This woofer is ideal for systems with vented enclosures, including gaming cabinets, bookshelf speakers, and home theater systems.

  • Woofer
  • 5.25” (133 mm) basket diameter
  • 40 watts, 8 ohms, 87 dB SPL
  • 1" copper voice coil, aluminum former
  • Ferrite magnet, stamped steel frame
  • Paper cone, foam surround

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.  

Pair this woofer with one of our MISCO Amplifiers.

Download Product Specifications (PDF) »

More Information
Brand Name Oaktron by MISCO
Model # 133-WF08-02
Size, Nominal (inch & mm) 5" (127 mm)
Shape of Speaker Other
Speaker Type Woofer
Application Arcade Gaming, Home Audio
Environment Indoor
RoHS Compliant Yes
Nominal Impedance (Z) (Ω) 8
Rated Power IEC268-5 (W) 40 Watts
Rated Impedance (Ω) 8
Continuous Power (W) 40
Program Power (W) 80
Frequency Range (Hz) 40 - 4,000
Sensitivity (dB SPL) ¹ 87
Resonant Frequency (Fs) (Hz) +/- 15% 83
DC Resistance (Re) (Ω) 6.7
Voice Coil Inductance (Le) (mH) 1.14
Mechanical Q Factor (Qms) 9.48
Electrical Q Factor (Qes) 0.74
Total Q Factor (Qts) 0.68
Mechanical Resistance (Rms) (kg/s) 0.85
Compliance Equivalent Volume (Vas) (L) 2.84
Suspension Compliance (Cms) (mm/N) 0.24
Surface Area of Diaphragm (Sd) (cm²) 91.6
Moving Mass (Mms) (gm) 15.3
Motor Force Factor (BL) (T•M) 8.5
Efficiency (η₀) (%) 0.21
Efficiency Bandwidth Product (EBP) (Fs/Qes) 112.6
Basket Type Stamped steel
Terminal Size (mm) 4.7 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) 340.2
Cone Body Material Paper
Cone Surround Material Polyether foam
Dust Cap Material Paper
Net Weight (kg) 1.04
Technical Notes

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