1. Introduction
Thank you for choosing the Clarion WF3030D 12-inch Shallow-Mount Car Audio Subwoofer. This subwoofer is engineered to deliver powerful bass performance in compact spaces, featuring a robust design with a dual 4-ohm voice coil for flexible wiring options and high power handling. This manual provides essential information for proper installation, operation, and maintenance to ensure optimal performance and longevity of your subwoofer.
2. Safety Information
- Professional Installation Recommended: For optimal performance and safety, it is highly recommended to have this subwoofer installed by a qualified car audio professional.
- Disconnect Battery: Always disconnect the vehicle's negative battery terminal before starting any electrical work to prevent short circuits and electrical damage.
- Proper Wiring: Ensure all wiring is correctly connected, insulated, and secured to prevent electrical shorts, overheating, and potential fire hazards. Refer to the wiring diagrams in the installation section.
- Avoid Moisture: Do not expose the subwoofer to water or excessive moisture. This product is not waterproof.
- Hearing Protection: Prolonged exposure to high sound pressure levels can cause permanent hearing damage. Use caution when adjusting volume levels.
- Secure Mounting: Ensure the subwoofer is securely mounted within its enclosure and the enclosure is properly secured within the vehicle to prevent movement during driving or in the event of an accident.
3. Package Contents
Please check the package for the following items:
- Clarion WF3030D 12-inch Shallow-Mount Subwoofer (Quantity: 1)
- Instruction Manual (This document)
Note: Additional mounting hardware, wiring, and enclosure are sold separately and are required for installation.
4. Setup and Installation
Proper installation is crucial for the performance and longevity of your subwoofer. Follow these guidelines carefully.
4.1. Mounting Dimensions
Before installation, ensure you have adequate space and the correct cutout for the subwoofer.
- Outside Dimension: 12-1/4" (310.5mm)
- Cutout Dimension: 11" (279.5mm)
- Mounting Depth: 3-1/4" (83.2mm)

Image: Side view of the Clarion WF3030D subwoofer, illustrating its shallow profile suitable for compact installations.
4.2. Enclosure Recommendations
The performance of your subwoofer is highly dependent on the enclosure it is installed in. Clarion recommends the following enclosure sizes:
- Sealed Enclosure: Approximately 0.6 cubic feet
- Vented Enclosure: Approximately 1.1 cubic feet
Consult with a car audio specialist for custom enclosure designs to match your specific vehicle and listening preferences.
4.3. Wiring the Dual 4-Ohm Voice Coils
The WF3030D features dual 4-ohm voice coils, offering flexibility in wiring configurations to match your amplifier's impedance requirements. Always ensure your amplifier is stable at the chosen impedance.

Image: Rear view of the Clarion WF3030D subwoofer, displaying the dual voice coil terminals for wiring connections.
- Series Wiring (8 Ohms): Connect the positive terminal of one voice coil to the negative terminal of the other voice coil. Connect the remaining positive terminal to the amplifier's positive output and the remaining negative terminal to the amplifier's negative output. This configuration results in an 8-ohm load.
- Parallel Wiring (2 Ohms): Connect both positive terminals of the voice coils together and both negative terminals of the voice coils together. Connect the combined positive to the amplifier's positive output and the combined negative to the amplifier's negative output. This configuration results in a 2-ohm load.
WARNING: Incorrect wiring can damage your subwoofer and/or amplifier. Always verify connections before applying power.
4.4. Amplifier Selection
Select an amplifier that can provide 300 Watts RMS (Continuous Power Handling) at the impedance you choose (2-ohm or 8-ohm). An amplifier with slightly more power than the subwoofer's RMS rating is generally preferred to prevent clipping, which can damage the subwoofer.
5. Operating Instructions
Once installed, follow these steps for initial setup and operation:
- Initial Power-Up: After installation, turn on your car audio system at a low volume. Gradually increase the volume to ensure all connections are secure and the subwoofer is functioning correctly.
- Amplifier Gain Setting: Adjust the gain control on your amplifier carefully. The gain control is not a volume knob; it matches the output voltage of your head unit to the input sensitivity of the amplifier. Set it to the lowest possible setting that achieves desired output without distortion.
- Crossover Settings: Use the low-pass filter (LPF) on your amplifier or head unit to send only low frequencies to the subwoofer. A typical LPF setting for a 12-inch subwoofer is between 80Hz and 120Hz.
- Phase Control: Some amplifiers or head units offer a phase control (0° or 180°). Experiment with this setting to find the one that provides the most cohesive bass response with your front speakers.
- Break-in Period: Allow a break-in period of approximately 10-20 hours of normal listening before operating the subwoofer at maximum output. This allows the suspension components to loosen up and perform optimally.
6. Maintenance
The Clarion WF3030D subwoofer requires minimal maintenance to ensure long-lasting performance.
- Cleaning: Use a soft, dry cloth to wipe down the subwoofer cone and surround. Avoid using harsh chemicals or abrasive cleaners.
- Inspection: Periodically check all wiring connections to ensure they are tight and free from corrosion. Inspect the subwoofer surround for any signs of cracking or damage.
- Environmental Factors: While designed for automotive use, extreme temperatures and humidity can affect performance and lifespan. Protect the subwoofer from direct sunlight and excessive heat.
7. Troubleshooting
If you experience issues with your subwoofer, refer to the following common problems and solutions:
7.1. No Sound from Subwoofer
- Check Power: Ensure the amplifier is receiving power (power light on). Check the main power fuse and the amplifier's fuses.
- Check Ground: Verify that the amplifier's ground connection is secure and making good contact with a clean metal surface on the vehicle chassis.
- Check Remote Turn-On: Ensure the remote turn-on wire from the head unit to the amplifier is connected and receiving 12V when the head unit is on.
- Check RCA Signal: Confirm that the RCA cables are securely connected from the head unit to the amplifier and that the head unit is sending an audio signal.
- Check Speaker Wires: Verify that the speaker wires from the amplifier to the subwoofer are correctly connected and not shorted.
- Amplifier Settings: Ensure the amplifier's gain is not set to minimum, and any mute functions are off.
7.2. Distorted Sound
- Gain Too High: Reduce the amplifier's gain setting. If the sound is distorted at high volumes, the amplifier may be clipping.
- Crossover Settings: Adjust the low-pass filter (LPF) on your amplifier or head unit. If the LPF is set too high, the subwoofer may be playing frequencies it's not designed for, causing distortion.
- Enclosure Issues: Ensure the subwoofer is properly sealed in its enclosure and that the enclosure itself is not rattling or vibrating.
- Damaged Subwoofer: Inspect the subwoofer cone and surround for any physical damage.
- Underpowered Amplifier: An amplifier that is too weak for the subwoofer can clip and cause distortion. Consider upgrading your amplifier if this is the case.
8. Specifications
Detailed technical specifications for the Clarion WF3030D 12-inch Shallow-Mount Subwoofer:
| Feature | Specification |
|---|---|
| Subwoofer Diameter | 12 Inches (30.5 cm) |
| Max Power Handling | 1000 Watts |
| Continuous Power Handling (RMS) | 300 Watts |
| Impedance | Dual 4-Ohm |
| Voice Coils | Heavy Duty Kapton Voice Coils |
| Surround | Nitrile Butadiene Rubber High Excursion Surround |
| Dust Cap | Aluminized IPP Dust Cap |
| Cone | Reinforced SPP Cone |
| Spider | Linear Cotton Spider with Integrated Tinsel Leads |
| Pole Piece | Hyper Extended Rear Vented Pole Piece |
| Basket | Custom Shallow Stamped Steel Powder Coated Basket |
| Frequency Response | 37-500 Hz |
| Efficiency | 87 dB/w/m |
| Outside Dimension | 12-1/4" (310.5mm) |
| Cutout Dimension | 11" (279.5mm) |
| Mounting Depth | 3-1/4" (83.2mm) |
| Recommended Sealed Enclosure Size | 0.6 cu.ft |
| Recommended Vented Enclosure Size | 1.1 cu.ft |
| Manufacturer | Clarion Audio |
| Recommended Uses | Car Audio |
| Connectivity Technology | Wired |
9. Warranty and Support
Clarion products are designed for reliability and performance. For specific warranty information, please refer to the warranty card included with your purchase or visit the official Clarion website. For technical support, installation assistance, or service inquiries, please contact Clarion customer service or an authorized Clarion dealer.
You can find more information and support resources on the official Clarion website: www.clarion.com





