Professional Audio Solutions Since 1949 3" (77 mm), 4 Ohm Mini-Woofer
- MSRP$33.99
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A lightweight mini-woofer designed for a variety of indoor and outdoor audio applications, including gaming, music, and medical devices. This 4 ohm, 3" driver includes a 2.5 Oz neodymium ring magnet, a 0.8" aluminum voice coil, and a flat polypropylene cone with a rubber surround for moisture and environmental resistance.
- Mini-woofer
- 3” (77 mm) steel basket diameter
- 20 watts, 4 ohms, 84 dB SPL
- 0.8" aluminum voice coil, Kapton former
- 2.5 Oz neodymium ring magnet
- Flat polypropylene cone, rubber surround
MISCO engineers use the world's most sophisticated loudspeaker measurement systems including the Klippel Analyzer to maximize and validate the speaker's design, as well as the Klippel QC module to ensure perfect unit to unit consistency and reliability.
Pair this woofer with one of our MISCO Amplifiers.
Download Product Specifications (PDF) »
| Brand Name | Oaktron by MISCO |
|---|---|
| Model # | 77-MB04-01 |
| Size, Nominal (inch & mm) | 3" (77 mm) |
| Shape of Speaker | Square |
| Speaker Type | Woofer |
| Application | Arcade Gaming, Casino Gaming, Medical, Musical Instruments |
| Environment | Outdoor / 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) | 125 - 20,000 |
| Sensitivity (dB SPL) ¹ | 84 |
| Resonant Frequency (Fs) (Hz) | 72 |
| DC Resistance (Re) (Ω) | 3.3 |
| Voice Coil Inductance (Le) (mH) | 0.48 |
| Mechanical Q Factor (Qms) | 5.51 |
| Electrical Q Factor (Qes) | 0.77 |
| Total Q Factor (Qts) | 0.67 |
| Mechanical Resistance (Rms) (kg/s) | 0.81 |
| Compliance Equivalent Volume (Vas) (L) | 0.60 |
| Suspension Compliance (Cms) (mm/N) | 0.50 |
| Surface Area of Diaphragm (Sd) (cm²) | 29.2 |
| Moving Mass (Mms) (gm) | 9.9 |
| Magnetic Gap Height (mm) | 4 |
| Coil Winding Height (mm) | 9.1 |
| Maximum Linear Excursion (Xmax) (mm) | 2.6 |
| Motor Force Factor (BL) (T•M) | 4.4 |
| Efficiency (η₀) (%) | 0.03 |
| Efficiency Bandwidth Product (EBP) (Fs/Qes) | 93.3 |
| Basket Type | Stamped steel, clear zinc plated |
| Terminal Size (mm) | 5.2 x 0.5 mm |
| Voice Coil Diameter (mm) | 19.3802 |
| Voice Coil Wire Material | Aluminum |
| Voice Coil Former Material | Kapton |
| Voice Coil Winding | 4 layer, round wire |
| Magnet Material | Neodymium |
| Magnet Weight (g) | 1.89 |
| Cone Body Material | Polypropylene |
| Cone Surround Material | Natural rubber |
| Dust Cap Material | Paper |
| Spider Material | Cotton / polyester |
| Net Weight (kg) | 0.25 |
| Technical Notes | ¹Sensitivity is measured with 2.83 volt input, measured on-axis at 1 meter distance |