4" (100 mm) Kevlar Cone, Mid-Range Speaker

Brand Name
Oaktron by MISCO
Model #
Part #
In stock

This high sensitivity midrange driver provides excellent voice and mid-range reproduction. Its treated Kevlar fiber cone is both light and resistant to modal break-up for high intelligibility and natural vocals. It provides moisture resistance for both indoor and outdoor use. This is also an excellent choice for line arrays due to its compact size, power handling, and high sensitivity. 

  • Polymer-treated Kevlar fiber cone
  • Powerful 3/4 pound, High Energy (HE) Ferrite magnet
  • Vented magnet assembly for increased heat dissipation
  • 80 Watts of program power handling
  • High sensitivity for high output from modest amplifiers
  • Narrow width pleated fabric surround to allow maximum cone surface area and good edge compliance.
  • Black powder coated steel basket
  • Extended service copper voice coil

Oaktron by MISCO is a premium line of high performance, ready-to-ship raw speaker drivers for a wide variety of applications including high end home audio, arcade, and casino games, automotive, aerospace 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.

MISCO engineers use the world's most sophisticated loudspeaker measurement systems including the Klippel Analyzer to maximize and validate the speaker's design, as well as the Klippel QC module to ensure perfect unit to unit consistency and reliability.   

This speaker is ideally suited for a wide variety of applications including:

  • Commercial audio speakers
  • Outdoor audio speakers
  • Line source array PA speakers

Download Product Specifications (PDF) »

More Information
Brand Name Oaktron by MISCO
Model # 100-MR08-02
Height 3.0000
Width 5.0000
Length 5.0000
Size, Nominal (inch & mm) 4" (100 mm)
Shape of Speaker Square
Speaker Type Mid-Range
Application Auto / Motorcycle, Commercial, Pro Sound, Transit, Voice Communications
Environment Outdoor / Indoor
RoHS Compliant No
Nominal Impedance (Z) (Ω) 8
Rated Power IEC268-5 (W) 40 Watts
Rated impedance (Ω) 8
Power, Continuous (W) 40
Power, Program (W) 80
Frequency range (Hz) 100 - 8,500
Sensitivity (dB SPL) ¹ 92
Resonant Frequency (Fs) (Hz) 130
DC resistance (Re) (Ω) 6.9
Voice Coil Inductance (Le) (mH) 0.35
Mechanical Q factor (Qms) 7.64
Electrical Q Factor (Qes) 0.59
Total Q factor (Qts) 0.55
Mechanical Resistance (Rms) (kg/s) 0.47
Compliance equivalent volume (Vas) (L) 2.03
Suspension Compliance (Cms) (mm/N) 0.34
Surface area of diaphragm (Sd) (cm²) 65.04
Moving mass (Mms) (gm) 4.40
Magnetic Gap Height (mm) 6.0
Coil winding height (mm) 8.9
Maximum linear excursion (Xmax) (mm) 1.4
Motor Force Factor (BL) (T•M) 6.5
Efficiency (η₀) (%) 0.74
Efficiency Bandwidth Product (EBP) (Fs/Qes) 221.98
Basket type Stamped steel, black powder coat finish
Terminal size 5.2 x 0.5 mm
Voice coil diameter (mm) 25.8
Voice coil wire material Copper
Voice coil former material Polyimide film
Voice Coil Winding 2 layers, single voice coil
Magnet Material Ferrite
Magnet weight (gm) 341
Cone body material Treated kevlar fiber
Cone surround material Treated pleated cloth
Dust cap material Treated paper
Spider Material Cloth
Net weight (kg) 0.93
Technical Notes

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