5.25 Inch (133 mm), 4 Ohm Coaxial Speaker

Brand Name
Red Line
Model #
Part #
In stock

The 93080 is a high-power, 5.25” extended range speaker with a coaxially mounted PEI dome tweeter. This versatile Red Line model works well in both sealed and vented enclosures in cars and motorcycle, showcasing ideal water resistance and impressive durability.

  • 5.25" (133 mm) steel basket diameter
  • 50 watt, 4 ohm, 89 dB SPL
  • 1" copper voice coil, Kapton former
  • PEI dome tweeter, coaxially mounted
  • Polypropylene cone, ferrite magnet

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.  

Download Product Specifications (PDF) »

More Information
Brand Name Red Line
Model # 133-CX04-01
Size, Nominal (inch & mm) 5" (127 mm)
Shape of Speaker Other
Speaker Type Coaxial
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) 80 - 20,000
Sensitivity (dB SPL) ¹ 89
Resonant Frequency (Fs) (Hz) +/- 15% 100
DC Resistance (Re) (Ω) 3.6
Voice Coil Inductance (Le) (mH) 0.24
Mechanical Q Factor (Qms) 5.54
Electrical Q Factor (Qes) 0.91
Total Q Factor (Qts) 0.78
Mechanical Resistance (Rms) (kg/s) 1.04
Compliance Equivalent Volume (Vas) (L) 3.19
Suspension Compliance (Cms) (mm/N) 0.26
Surface Area of Diaphragm (Sd) (cm²) 93.31
Moving Mass (Mms) (gm) 8.58
Motor Force Factor (BL) (T•M) 4.8
Efficiency (η₀) (%) 0.41
Efficiency Bandwidth Product (EBP) (Fs/Qes) 11.50
Basket Type Stamped steel
Terminal Size (mm) 6.4 x 0.8 / 4.7 x 0.5
Voice Coil Diameter (mm) 25.781
Voice Coil Wire Material High temperature copper
Voice Coil Former Material Kapton
Voice Coil Winding Single Layer
Magnet Material Ferrite
Magnet Weight (g) 263.65
Cone Body Material Polypropylene, mica filled
Cone Surround Material Cloth
Spider Material Cloth
Net Weight (kg) 0.89
Technical Notes

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