5 Inch (127 mm) 4 Ohm, Home Audio Woofer

Brand Name
Oaktron by MISCO
Model #
Part #
In stock

MISCO Oaktron woofers like the 93027 are ideal as both driver replacements and the foundation of many DIY loudspeaker projects. High-quality bass and a smooth frequency response make this bookshelf speaker a great addition to gaming cabinets, home audio sound bars, and music sound systems with vented enclosures.

  • Woofer
  • 5.25 in. (133 mm) basket diameter
  • 40 watts, 4 ohms, 89 dB SPL
  • 1 in. copper voice coil, Kapton former
  • Ferrite magnet, stamped steel frame
  • Polypropylene cone, cloth 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 # 127-WF04-01
Size, Nominal (inch & mm) 5" (127 mm)
Shape of Speaker Round
Speaker Type Woofer
Application Arcade Gaming, High-End Audio and Home Theater, Home Audio
Environment Indoor
RoHS Compliant No
Nominal Impedance (Z) (Ω) 4
Rated Power IEC268-5 (W) 40 Watts
Rated Impedance (Ω) 4
Continuous Power (W) 40
Program Power (W) 80
Frequency Range (Hz) 80 - 7,000
Sensitivity (dB SPL) ¹ 89
Resonant Frequency (Fs) (Hz) +/- 15% 45
DC Resistance (Re) (Ω) 3.4
Voice Coil Inductance (Le) (mH) 0.32
Mechanical Q Factor (Qms) 4.60
Electrical Q Factor (Qes) 0.40
Total Q Factor (Qts) 0.36
Mechanical Resistance (Rms) (kg/s) 0.56
Compliance Equivalent Volume (Vas) (L) 5.97
Suspension Compliance (Cms) (mm/N) 1.09
Surface Area of Diaphragm (Sd) (cm²) 62.2
Moving Mass (Mms) (gm) 7.2
Maximum Linear Excursion (Xmax) (mm) 1.6
Motor Force Factor (BL) (T•M) 4.7
Efficiency (η₀) (%) 0.26
Efficiency Bandwidth Product (EBP) (Fs/Qes) 113.6
Basket Type Stamped steel
Terminal Size (mm) 5.2 x 0.5
Voice Coil Diameter (mm) 25.4
Voice Coil Wire Material Copper
Voice Coil Former Material Kapton
Voice Coil Winding Single Layer
Magnet Material Ferrite
Magnet Weight (g) 283.5
Cone Body Material Polypropylene
Cone Surround Material Treated cloth
Dust Cap Material Polypropylene
Net Weight (kg) 0.88
Technical Notes

¹Sensitivity is measured with 2.83 volt input, measured on-axis at 1 meter distance; 2 Power testing per EIA-426