3" (77 mm) Square, Ring Magnet, Mini-Woofer

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From gaming applications, to music, to medical devices, the 93025 mini-woofer emits big sounds from a compact, easy to mount driver. 20-Watts of continuous power, a neodymium ring magnet, a flat polypropylene cone, and a panel for added mass ensures that your system’s lowest sounds are heard – both indoors and outdoors.  Pair those features with a 3” square steel basket, and you have a speaker ready to give your listeners the sound they deserve.

  • Mini-Woofer
  • 3” (77 mm) Basket Diameter
  • 20 Watts, 8 Ohms
  • High-Power Neodymium Ring Magnet
  • Flat Polypropylene Cone with Rubber Surround
  • Steel-Stamped Basket

Oaktron by MISCO is a premium line of high performance, ready-to-ship transducers and drivers for a wide variety of applications including high fidelity, 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.   

Download Product Specifications (PDF) »

More Information
Model # 77-MB04-01
Height 2.0000
Width 4.0000
Length 4.0000
Size, Nominal (inch & mm) 3" (77 mm)
Shape of Speaker Square
Speaker Type Subwoofer
Application Arcade Gaming, Casino Gaming, Medical, Musical Instruments
Environment Outdoor / Indoor
RoHS Compliant Yes
Nominal Impedance (Z) (Ω) 4
Rated Power IEC268-5 (W) 20 Watts
Rated impedance (Ω) 4
Power, Continuous (W) 20
Power, Program (W) 40
Frequency range (Hz) 125 - 20k
Sensitivity (dB SPL) ¹ 84
Resonant Frequency (Fs) (Hz) 72
DC resistance (Re) (Ω) 3.31
Voice Coil Inductance (Le) (mH) 0.15
Mechanical Q factor (Qms) 5.506
Electrical Q Factor (Qes) 0.772
Total Q factor (Qts) 0.67
Mechanical Resistance (Rms) (kg/s) 0.808
Compliance equivalent volume (Vas) (L) 0.6023
Suspension Compliance (Cms) (mm/N) 0.498
Surface area of diaphragm (Sd) (cm²) 29.22
Moving mass (Mms) (gm) 9.852
Magnetic Gap Height (mm) 4
Coil winding height (mm) 9.14
Maximum linear excursion (Xmax) (mm) 2.57
Motor Force Factor (BL) (T•M) 4.366
Efficiency (η₀) (%) 0.028
Efficiency Bandwidth Product (EBP) (Fs/Qes) 93.2642487
Basket type Stamped Steel
Terminal size 5.2 mm x 0.5 mm
Voice coil diameter (mm) 19.3802
Voice coil wire material Copper Clad Aluminum
Voice coil former material Kapton
Voice Coil Winding 4 Layer, Round Wire
Magnet Material Neodymium
Magnet weight (gm) 1.89
Cone body material Polypropylene
Cone surround material Natural Rubber
Dust cap material Paper
Spider Material Cotton / Polyester
Net weight (kg) 0.25
Technical Notes

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