8 Inch (203 mm) Ceiling Speaker Assembly
Brand Name
Oaktron by MISCO
Model #
OK8-T74-RW
Part #
93120
In stock
$49.99
The OK8-T74-RW is a commercial in-ceiling speaker assembly 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. This model includes the 8WB ceiling speaker grille and the 4T70 transformer.
- Extended range speaker with whizzer
- 8" (203 mm) steel basket diameter
- 15 watts, 8 ohm, 90 dB SPL
- 1" copper voice coil, aluminum former
- Paper cone and whizzer, ferrite magnet
- 13" steel speaker grille, 4 watt 70 volt transformer
Download Product Specifications (PDF) »
| Brand Name | Oaktron by MISCO |
|---|---|
| Model # | OK8-T74-RW |
| 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 |
| 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) | 1.91 |
| Technical Notes | ¹ Sensitivity is measure with 2.83 volt input, measured on-axis at 1 meter distance |