Oaktron by MISCO 25-TD04-02 1" 4 Ohm (93020)

SKU: 25-TD04-02

Canadian Dollar Price:
Sale price$40.99
In stock (6 units)


This Oaktron one-inch silk dome tweeter is a prime choice for two-way speaker systems. It features a conical wave guide design for a smoother frequency response, a large rear chamber for lower frequency crossovers*, and a high-energy neodymium magnet. The faceplate features recessed mounting holes to minimize reflections from mounting screws.

  • Tweeter
  • 1" (25 mm) basket diameter
  • 20 watts, 4 ohms, 87 dB SPL
  • 1" aluminum voice coil, aluminum former
  • Neodymium magnet, ABS plastic mounting plate & rear chamber
  • Silk dome cone, silk surround

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 confirm the speaker's design, as well as the Klippel QC module to ensure perfect unit to unit consistency and reliability.  

* Note: Protect your system's tweeters. Allowing lower frequencies to reach a tweeter can cause lasting damage. Use a passive or active high-pass filter (crossover) with this tweeter, and a simple first order (6 dB/octave) of a proper value capacitor to block low frequencies. MISCO suggests using a crossover that includes a capacitor and an inductor to achieve steeper low-frequency filtering of 12dB per octave. See the specifications of this tweeter for the smallest recommended crossover frequency.     

This tweeter is ideal for use in a wide variety of applications including: 

  • Home audio systems
  • Home theater systems
  • Automotive and motorcycle audio speakers
  • Arcade speakers
  • Casino gaming cabinets
  • Smart devices and speakers

Download Product Specifications (PDF) »

More Information
Brand Name Oaktron by MISCO
Model # 25-TD04-02
Size, Nominal (inch & mm) 1"
Shape of Speaker Round
Speaker Type Tweeter
Application High-End Audio and Home Theater, Indoor, Musical Instruments, Pro Sound
Environment Indoor
RoHS Compliant Yes
Nominal Impedance (Z) (Ω) 4
Rated Power IEC268-5 (W) 20 Watts
Rated Impedance (Ω) 4
Continuous Power (W) 20
Program Power (W) 40
Frequency Range (Hz) 700 - 20,000
Sensitivity (dB SPL) ¹ 87
Resonant Frequency (Fs) (Hz) 735
DC Resistance (Re) (Ω) 3.6
Voice Coil Inductance (Le) (mH) 0.03
Mechanical Q Factor (Qms) 1.16
Electrical Q Factor (Qes) 1.29
Total Q Factor (Qts) 0.61
Mechanical Resistance (Rms) (kg/s) 1.28
Compliance Equivalent Volume (Vas) (L) 0.01
Suspension Compliance (Cms) (mm/N) 0.15
Surface Area of Diaphragm (Sd) (cm²) 7.1
Moving Mass (Mms) (gm) 0.3
Motor Force Factor (BL) (T•M) 2.1
Efficiency (η₀) (%) 0.31
Efficiency Bandwidth Product (EBP) (Fs/Qes) 571.8
Basket Type ABS plastic mounting plate and rear chamber
Terminal Size (mm) 4.7 x 0.5 mm
Voice Coil Diameter (mm) 25
Voice Coil Wire Material Copper clad aluminum
Voice Coil Former Material Aluminum
Voice Coil Winding Single coil, two layer
Magnet Material Neodymium
Cone Body Material Single piece, treated silk dome - Black
Cone Surround Material Single piece, treated silk dome - Black
Net Weight (kg) 0.09
Technical Notes

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

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