1 Inch (25 mm) 4 Ohm, Silk Dome Tweeter

Brand Name
Oaktron by MISCO
Model #
Part #
In stock

The 93021 is a silk dome tweeter made for indoor systems, providing both high output, and smooth, low-distortion sound. A low resonant frequency design makes this tweeter easy to pair with high-quality woofers as well. Use this product to create top-notch line arrays within close-fitting spaces.

  • Tweeter
  • 1” (25 mm) basket diameter
  • 20 watts, 4 ohms, 90 dB SPL
  • High energy neodymium magnet
  • Silk dome 

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 confirm the final design.  

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More Information
Brand Name Oaktron by MISCO
Model # 25-TD08-01
Size, Nominal (inch & mm) 1" (25 mm)
Shape of Speaker Round
Speaker Type Tweeter
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) 650 - 20,000
Sensitivity (dB SPL) ¹ 90
Resonant Frequency (Fs) (Hz) +/- 15% 650
DC Resistance (Re) (Ω) 3.6
Voice Coil Inductance (Le) (mH) 0.001
Mechanical Q Factor (Qms) 0.73
Electrical Q Factor (Qes) 1.55
Total Q Factor (Qts) 0.72
Mechanical Resistance (Rms) (kg/s) 0.30
Compliance Equivalent Volume (Vas) (L) 0.01
Suspension Compliance (Cms) (mm/N) 0.87
Surface Area of Diaphragm (Sd) (cm²) 7.1
Moving Mass (Mms) (gm) 0.3
Motor Force Factor (BL) (T•M) 1.9
Efficiency (η₀) (%) 0.01
Efficiency Bandwidth Product (EBP) (Fs/Qes) 418.8
Basket Type ABS, black finish
Voice Coil Diameter (mm) 25.4
Voice Coil Wire Material Copper
Voice Coil Former Material Aluminum
Voice Coil Winding Single Layer
Magnet Material Neodymium
Magnet Weight (g) 20.4
Cone Body Material Silk
Net Weight (kg) 0.07
Technical Notes

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