5 Inch (133 mm) Neo-Rite Work-Horse Woofer

Brand Name
Oaktron by MISCO
Model #
Part #
In stock

The 93031 Neo-Rite Woofer uses a compound magnet to operate in high-power music systems. Install this driver into small enclosures meant for home theaters, pro-sound, and gaming cabinets.

  • Woofer
  • 5.25 inch (133 mm) basket diameter
  • 50 watts, 4 ohms, 87 dB SPL
  • 1 in. copper voice coil, aluminum former
  • Neodymium/ferrite magnet, stamped-steel basket
  • Polypropylene cone, Santoprene 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 are used to validate the final design. 

Oaktron by MISCO is the premium line of high-performance, ready-to-ship transducers for a wide variety of applications, including high fidelity, musical instruments, automotive applications, and many more. From elegantly simple to highly specialized designs for unique and demanding applications, there is an Oaktron loudspeaker perfectly suited for your needs.

Pair this woofer with one of our MISCO Amplifiers

Download Product Specifications (PDF) »

More Information
Brand Name Oaktron by MISCO
Model # 133-WF04-04
Size, Nominal (inch & mm) 5" (127 mm)
Shape of Speaker Round
Speaker Type Woofer
Application Auto / Motorcycle, Home Audio
Environment Outdoor / Indoor
RoHS Compliant Yes
Nominal Impedance (Z) (Ω) 4
Rated Power IEC268-5 (W) 50 Watts
Rated Impedance (Ω) 4
Continuous Power (W) 50
Program Power (W) 100
Frequency Range (Hz) 40 - 7,500
Sensitivity (dB SPL) ¹ 87
Resonant Frequency (Fs) (Hz) +/- 15% 56
DC Resistance (Re) (Ω) 3.3
Voice Coil Inductance (Le) (mH) 0.35
Mechanical Q Factor (Qms) 11.74
Electrical Q Factor (Qes) 0.56
Total Q Factor (Qts) 0.53
Mechanical Resistance (Rms) (kg/s) 0.56
Compliance Equivalent Volume (Vas) (L) 4.59
Suspension Compliance (Cms) (mm/N) 0.43
Surface Area of Diaphragm (Sd) (cm²) 86.6
Moving Mass (Mms) (gm) 18.5
Magnetic Gap Height (mm) 4.5
Coil Winding Height (mm) 12.2
Maximum Linear Excursion (Xmax) (mm) 3.8
Motor Force Factor (BL) (T•M) 6.3
Efficiency (η₀) (%) 0.14
Efficiency Bandwidth Product (EBP) (Fs/Qes) 101.1
Basket Type Stamped steel with black powder coat
Terminal Size (mm) 4.7 x 0.5 mm
Voice Coil Diameter (mm) 25.8
Voice Coil Wire Material Copper
Voice Coil Former Material Aluminum
Voice Coil Winding 2 layer, single coil
Magnet Material Neodymium / ferrite
Magnet Weight (g) 12 oz ferrite + 1 oz neodymium
Cone Body Material Mica filled polypropylene
Cone Surround Material Santoprene
Dust Cap Material Mica filled polypropylene
Spider Material Woven cloth
Net Weight (kg) 0.96
Technical Notes

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