10 Inch (250 mm) 4 Ohm Legacy Woofer

Brand Name
Oaktron by MISCO
Model #
Part #
In stock

We brought this woofer back to life to help out people who need to keep their old stereo's going.  But this woofer has a lot to offer today's market. It was designed for music and to be installed into three-way or two-way system enclosures. Its high sensitivity gives you more output per watt. This cone is made from a vintage USA tool and pulp formula that creates a warm timbre one doesn't find in many of today's cones. The polyether foam surround is both compliant and super light weight so as to not dampen the bass transients.

  • Woofer
  • 10" (250 mm) basket diameter
  • 50 watts, 4 ohms, 92 dB SPL
  • 1.5" copper voice coil, polyimide film former
  • Ferrite magnet, stamped-steel basket
  • Made in America pulp cone, polyether 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 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 # 250-WF04-01
Size, Nominal (inch & mm) 10" (250 mm)
Shape of Speaker Round
Speaker Type Woofer
Application Home Audio
Environment 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) 16 - 4,000
Sensitivity (dB SPL) ¹ 92
Resonant Frequency (Fs) (Hz) +/- 15% 28
DC Resistance (Re) (Ω) 3.8
Voice Coil Inductance (Le) (mH) 0.82
Mechanical Q Factor (Qms) 11.95
Electrical Q Factor (Qes) 0.36
Total Q Factor (Qts) 0.35
Mechanical Resistance (Rms) (kg/s) 0.43
Compliance Equivalent Volume (Vas) (L) 181.78
Suspension Compliance (Cms) (mm/N) 1.11
Surface Area of Diaphragm (Sd) (cm²) 339.8
Moving Mass (Mms) (gm) 29.4
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) 7.4
Efficiency (η₀) (%) 1.05
Efficiency Bandwidth Product (EBP) (Fs/Qes) 77.7
Basket Type Heavy-duty american stamped steel, black powder coat
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 coil, two layers
Magnet Material Ferrite
Magnet Weight (g) 792
Cone Body Material Engineered american pulp
Cone Surround Material Polyether foam
Dust Cap Material Treated cloth
Spider Material cotton
Net Weight (kg) 2.9
Technical Notes

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