Deaf Bonce DB-MF-12R-D4
Deaf Bonce Machete 12" Subwoofer User Manual
Model: MF-12R D4 | Brand: Deaf Bonce
Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your Deaf Bonce Machete 12" 2400W 4+4 Ohm Dual Voice Coil Subwoofer, model MF-12R D4. Please read this manual thoroughly before using the product to ensure optimal performance and longevity.

Figure 1: Front view of the Deaf Bonce Machete 12" Subwoofer. This image displays the subwoofer's cone and surround, highlighting its robust construction.
What's in the Box
Upon opening the product packaging, verify that all components are present and undamaged.
- (1) Deaf Bonce 12" Subwoofer MF-12R-D4

Figure 2: The product packaging for the Deaf Bonce Machete 12" Subwoofer. The box features branding and model information.
Setup and Installation
Proper installation is crucial for the performance and safety of your subwoofer. It is recommended that installation be performed by a qualified professional.
Mounting Considerations
- Mounting Depth: 6.3 inches (161.8mm)
- Cut-out Dimension: 11.1 inches (282mm)
- Ensure adequate clearance behind the subwoofer for proper ventilation and excursion.
- Mount the subwoofer securely in a suitable enclosure or mounting location to prevent movement during operation.
Wiring and Connections
The MF-12R D4 features a dual voice coil design with 4+4 Ohm impedance. Proper wiring is essential to achieve the desired final impedance for your amplifier.

Figure 3: Rear view of the Deaf Bonce Machete 12" Subwoofer, showing the dual voice coil terminals. These terminals are used for connecting the subwoofer to an amplifier.
- Connect the subwoofer to a compatible amplifier using appropriate gauge speaker wire.
- For optimal performance and to prevent damage, ensure the amplifier's output impedance matches the subwoofer's wired impedance.
- Common wiring configurations for dual 4 Ohm voice coils include:
- Parallel Wiring: Connect both voice coils in parallel for a 2 Ohm final impedance.
- Series Wiring: Connect both voice coils in series for an 8 Ohm final impedance.
- Ensure all connections are secure and free from short circuits.
Operating Instructions
Once installed, the subwoofer is ready for operation. Always ensure your audio system is properly configured to prevent damage to the subwoofer or other components.
- Power Handling: The subwoofer has a MAX Power of 2400W and an RMS Power of 1200W. Do not exceed these ratings to prevent damage.
- Amplifier Matching: Use an amplifier that can provide sufficient power within the subwoofer's RMS rating, and ensure its impedance output matches the subwoofer's wired impedance.
- Gain Setting: Set the amplifier's gain correctly to avoid clipping, which can lead to distortion and damage.
- Crossover Settings: Utilize your amplifier's or head unit's low-pass filter (LPF) to send only low-frequency signals to the subwoofer. A typical LPF setting for subwoofers is between 60Hz and 100Hz.
- Compatible Devices: This subwoofer is designed for use with car audio systems, connecting to compatible devices such as head units, amplifiers, and other audio sources.
Maintenance
Regular maintenance helps ensure the longevity and performance of your subwoofer.
- Cleaning: Use a soft, dry cloth to wipe down the subwoofer. Avoid using harsh chemicals or abrasive cleaners.
- Environmental Conditions: This product is not waterproof. Avoid exposure to moisture, extreme temperatures, and direct sunlight.
- Connection Checks: Periodically inspect all wiring connections to ensure they remain secure and free from corrosion.
- Listen for Distortion: If you hear any distortion, reduce the volume immediately to prevent damage to the voice coil.
Troubleshooting
If you experience issues with your subwoofer, refer to the following common problems and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| No Sound from Subwoofer |
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| Distorted Sound |
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| Subwoofer Overheating |
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Specifications
| Model Name | MF-12R-D4 |
| Speaker Type | Subwoofer |
| Subwoofer Diameter | 12 Inches |
| MAX Power | 2400 Watts |
| RMS Power | 1200W |
| Voice Coil Size | 3" |
| Impedance | 4+4 Ohm (Dual Voice Coil) |
| Magnet Type | Ferrite |
| Cone Material | Paper |
| Voice Coil Wire | CCAW |
| Surround Material | Foam |
| Frame Material | Steel |
| SPL | 86.30 dB |
| Fs | 38Hz |
| BL | 20.50 |
| Vas | 27.60L |
| Xmeh | 30mm |
| Xmax | 0.59 inches (15mm) |
| Mounting Depth | 6.3 inches (161.8mm) |
| Cut-out Dimension | 11.1 inches (282mm) |
| Item Weight | 21.8 pounds (approx. 10.25 kg) |
| Is Waterproof | FALSE |
| Connectivity Technology | Wired |
| UPC | 795958008917 |
Warranty and Support
This product comes with a Limited Warranty. For specific warranty terms and conditions, please refer to the documentation provided with your purchase or contact Deaf Bonce customer support.
For technical assistance, troubleshooting beyond this manual, or warranty claims, please contact the manufacturer directly. Visit the official Deaf Bonce website for contact information.
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