8 Inch (203 mm) 4 Ohm, Premium Woofer

Brand Name
Oaktron by MISCO
Model #
Part #
In stock

This 8" woofer provides bass you can feel. It is an excellent choice for two-way audio systems or ones requiring more than one driver. It features an engineered black carbon filled polypropylene cone with a half-roll black molded natural rubber surround. A carefully designed flat spider assures linear voice coil travel in both directions. The dust cap is a light weight treated cloth which allows for extended frequency response to allow for higher cross-over frequencies if desired.  A decorative rubber trim ring around the frame provides sealing when mounted in the enclosure.  It may also be removed to match the final product cosmetics.

  • Woofer
  • 8 in. (203 mm) basket diameter
  • 75 watts, 4 ohms, 92 dB SPL
  • 1.5 in. copper voice coil, Kapton former
  • Ferrite magnet, stamped-steel frame
  • Polypropylene cone, NBR rubber 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 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 instrument, automotive 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 # 203-WF04-03
Size, Nominal (inch & mm) 8" (203 mm)
Shape of Speaker Round
Speaker Type Woofer
Application High-End Audio and Home Theater, Home Audio
Environment Indoor
RoHS Compliant Yes
Nominal Impedance (Z) (Ω) 4
Rated Power IEC268-5 (W) 75 Watts
Rated Impedance (Ω) 4
Continuous Power (W) 75
Program Power (W) 150
Frequency Range (Hz) 35 - 4,000
Sensitivity (dB SPL) ¹ 92
Resonant Frequency (Fs) (Hz) +/- 15% 35
DC Resistance (Re) (Ω) 4.0
Voice Coil Inductance (Le) (mH) 0.57
Mechanical Q Factor (Qms) 5.87
Electrical Q Factor (Qes) 0.26
Total Q Factor (Qts) 0.25
Mechanical Resistance (Rms) (kg/s) 0.97
Compliance Equivalent Volume (Vas) (L) 60.56
Suspension Compliance (Cms) (mm/N) 0.79
Surface Area of Diaphragm (Sd) (cm²) 232.4
Moving Mass (Mms) (gm) 25.7
Magnetic Gap Height (mm) 7.9
Coil Winding Height (mm) 18.8
Maximum Linear Excursion (Xmax) (mm) 5.4
Motor Force Factor (BL) (T•M) 9.3
Efficiency (η₀) (%) 0.98
Efficiency Bandwidth Product (EBP) (Fs/Qes) 134.7
Basket Type Heavy duty stamped steel basket, powder coat black finish
Terminal Size (mm) 5.2 x 0.5 mm
Voice Coil Diameter (mm) 38.7
Voice Coil Wire Material Copper
Voice Coil Former Material Polyimide film
Voice Coil Winding Single voice coil, two layers
Magnet Material Ferrite
Magnet Weight (g) 795
Cone Body Material Carbon filled polypropylene
Cone Surround Material NBR rubber
Dust Cap Material Treated cloth
Spider Material Flat formed cloth
Net Weight (kg) 2.7
Technical Notes

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