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The OK8-T74 is a commercial extended range speaker with an attached 4 watt transformer for paging systems, voice communications, and background music applications. Increase your sound system's high frequency dispersion with this driver's whizzer cone attached directly to the voice coil.
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Brand Name | Oaktron by MISCO |
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Model # | OK8-T74 |
Size, Nominal (inch & mm) | 8" (203 mm) |
Shape of Speaker | Round |
Speaker Type | Wide Range |
Application | Commercial, Indoor, Voice Communications |
Environment | Indoor |
RoHS Compliant | No |
Nominal Impedance (Z) (Ω) | 8 |
Rated Power IEC268-5 (W) | 15 Watts |
Rated Impedance (Ω) | 8 |
Continuous Power (W) | 15 |
Program Power (W) | 30 |
Frequency Range (Hz) | 40 - 18,000 |
Sensitivity (dB SPL) ¹ | 90 |
Resonant Frequency (Fs) (Hz) +/- 15% | 90 |
DC Resistance (Re) (Ω) | 7.3 |
Voice Coil Inductance (Le) (mH) | 0.27 |
Mechanical Q Factor (Qms) | 9.28 |
Electrical Q Factor (Qes) | 0.87 |
Total Q Factor (Qts) | 0.79 |
Mechanical Resistance (Rms) (kg/s) | 0.47 |
Compliance Equivalent Volume (Vas) (L) | 15.5 |
Suspension Compliance (Cms) (mm/N) | 0.39 |
Surface Area of Diaphragm (Sd) (cm²) | 219.0 |
Moving Mass (Mms) (gm) | 7.53 |
Maximum Linear Excursion (Xmax) (mm) | 1.1 |
Motor Force Factor (BL) (T•M) | 6.08 |
Efficiency (η₀) (%) | 2.6 |
Efficiency Bandwidth Product (EBP) (Fs/Qes) | 103.45 |
Basket Type | Stamped steel |
Terminal Size (mm) | 4.8 x 0.5 |
Voice Coil Diameter (mm) | 25.4 |
Voice Coil Wire Material | Copper |
Voice Coil Former Material | Aluminum |
Voice Coil Winding | Single Layer |
Magnet Material | Ferrite |
Magnet Weight (g) | 283.5 |
Cone Body Material | Paper composite |
Dust Cap Material | Paper whizzer |
Spider Material | Cotton |
Net Weight (kg) | 0.9 |
Technical Notes | ¹ Sensitivity is measure with 2.83 volt input, measured on-axis at 1 meter distance
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