1. Introduction
Thank you for choosing the H YANKA BSP-12-4 12 Inch Subwoofer. This subwoofer is engineered to deliver powerful, deep bass with a maximum power output of 2800W and 1400W RMS. Featuring a 3-inch dual voice coil with 4 Ohm impedance, a durable paper cone, and a robust black aluminum basket, it is designed for high-quality car audio performance. This manual provides essential information for proper installation, operation, and maintenance to ensure optimal sound and longevity of your subwoofer.
2. Safety Information
- Professional Installation Recommended: For optimal performance and safety, professional installation by a qualified car audio technician is highly recommended.
- Power Handling: Ensure your amplifier's power output matches the subwoofer's RMS rating (1400W). Overpowering can lead to damage.
- Wiring: Always use appropriate gauge wiring for power and speaker connections. Incorrect wiring can cause electrical shorts or damage to components.
- Volume Control: Avoid operating the subwoofer at maximum volume for extended periods to prevent distortion and potential damage. For best listening experience, set the volume to 80%.
- Secure Mounting: Ensure the subwoofer is securely mounted within its enclosure and the enclosure is firmly secured in the vehicle to prevent movement during driving.
- Ventilation: Allow adequate ventilation around the subwoofer and amplifier to prevent overheating.
3. Product Features
The H YANKA BSP-12-4 Subwoofer incorporates several design elements for superior performance and durability:
- Powerful Bass Performance: Delivers deep, powerful bass with 2800W max power and 1400W RMS.
- Dual Voice Coil: Features a 3-inch dual voice coil with 4 Ohm impedance for flexible wiring options and high-quality sound.
- Durable Paper Cone: Equipped with a strong paper cone with foam edge reinforcement to handle intense bass vibrations.
- Black Aluminum Basket: Built with a black aluminum basket for strength, durability, and heat dissipation.
- High Sensitivity: Boasts a sensitivity of 88 dB for efficient power conversion into sound output.
- Chrome Push Terminals: Provides easy and secure connections for reliable signal transmission.
- Reinforced Foam Edge: The foam edge is reinforced with orange stitching for durability and to withstand high-performance use.
- Advanced Magnet Structure: Features dual Y35 magnets (190 mm x 25 mm) for powerful magnetic force and high-quality sound.
- Improved X-Max: Offers a maximum excursion of 0.65 inches for deep bass response with minimal distortion.

Image: Detailed views of the subwoofer's premium components, highlighting the voice coil, terminals, and reinforced foam edge.
4. Setup and Installation
The H YANKA BSP-12-4 subwoofer is designed for in-car installation and is compatible with sealed or ported enclosures. It supports both under-seat and trunk installations, depending on available space and desired bass output. The subwoofer is equipped with press-fit terminals for quick and secure wiring, and it mounts easily using standard subwoofer brackets or screws, ensuring a stable fit in most car audio setups.
4.1. Pre-Installation Checks
- Verify that your amplifier's power output and impedance match the subwoofer's specifications.
- Ensure the chosen mounting location and enclosure provide adequate space and ventilation.
- Disconnect the vehicle's battery before beginning any wiring.
4.2. Wiring Diagrams
Proper wiring is crucial for optimal performance and to prevent damage. The BSP-12-4 features a dual 4 Ohm voice coil, offering flexible wiring configurations to match various amplifier loads. Below are common wiring options:

Image: Wiring diagrams illustrating how to connect the dual 4 Ohm subwoofer to an amplifier for different impedance loads (e.g., 2 Ohm, 4 Ohm, 8 Ohm).
Dual Subwoofers with Two Amplifiers (4 Ohm Load per Amplifier)

Image: This diagram shows two BSP-12-4 subwoofers, each wired to a dedicated amplifier, resulting in a 4 Ohm load per amplifier. Each voice coil of a subwoofer is connected in series to achieve 8 Ohm, then two 8 Ohm coils are wired in parallel to achieve 4 Ohm for each subwoofer.
Single Subwoofer with One Amplifier (2 Ohm Load)

Image: This diagram illustrates a single BSP-12-4 subwoofer wired to one amplifier, configured for a 2 Ohm load. The two 4 Ohm voice coils are wired in parallel.
4.3. Optimal Enclosure Specifications
The performance of your subwoofer is highly dependent on the enclosure it is installed in. The BSP-12-4 subwoofer can be mounted in a separate wooden enclosure. Ensure that the depth of the intended installation area is adequate and that the speaker is not obstructed once installed.
Single BSP-12 Subwoofer Enclosure
- Closed Box: Recommended internal volume of 1.97 cubic feet, box cutoff frequency at 43Hz.
- Open Box: Recommended internal volume of 3.1 cubic feet, box cutoff frequency at 37Hz.

Image: Detailed diagrams for constructing optimal wooden enclosures for a single BSP-12 subwoofer, showing dimensions for both closed and open box designs.
Two BSP-12 Subwoofers Enclosure
- Closed Box: Recommended internal volume of 3.88 cubic feet, box cutoff frequency at 39Hz.
- Open Box: Recommended internal volume of 5.08 cubic feet, box cutoff frequency at 31Hz.

Image: Detailed diagrams for constructing optimal wooden enclosures for two BSP-12 subwoofers, showing dimensions for both closed and open box designs.
4.4. Subwoofer Dimensions

Image: Diagram showing the key dimensions of the subwoofer, including mounting depth and overall diameter, essential for enclosure design.
5. Operating Instructions
Once installed, follow these guidelines for operating your H YANKA BSP-12-4 subwoofer:
- Initial Power-Up: After installation, turn on your car audio system at a low volume. Gradually increase the volume and bass levels to ensure all connections are secure and the subwoofer is functioning correctly.
- Break-in Period: Allow a break-in period of several hours of moderate use before operating the subwoofer at high volumes. This allows the suspension components to loosen and perform optimally.
- Amplifier Settings: Adjust your amplifier's gain, crossover, and bass boost settings according to your preference and the subwoofer's capabilities. Refer to your amplifier's manual for detailed instructions.
- Volume Level: For the best listening experience and to prolong the life of your subwoofer, set the volume to approximately 80% of its maximum capability. Avoid sustained operation at peak volume levels to prevent distortion and potential damage.
Video: An official product video demonstrating the H YANKA BSP-12/15" Subwoofer, showcasing its powerful bass capabilities and design features. This video provides a visual overview of the subwoofer's performance.
6. Maintenance
To ensure the longevity and optimal performance of your H YANKA subwoofer, follow these maintenance tips:
- Cleaning: Use a soft, dry cloth to gently wipe down the subwoofer cone and surround. Avoid using harsh chemicals or abrasive materials.
- Inspection: Periodically inspect the wiring connections for any signs of corrosion or looseness. Ensure the mounting screws are tight.
- Environmental Protection: Protect the subwoofer from extreme temperatures, direct sunlight, and moisture.
- Avoid Over-Excursion: Do not push the subwoofer beyond its mechanical limits (X-Max) by excessive volume or improper amplifier settings, as this can cause damage to the cone and voice coil.
7. Troubleshooting
If you encounter issues with your H YANKA 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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| Weak Bass Output |
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If these steps do not resolve the issue, please contact H YANKA customer support for further assistance.
8. Specifications
Detailed technical specifications for the H YANKA BSP-12-4 12 Inch Subwoofer:
| Feature | Specification |
|---|---|
| Brand | H YANKA |
| Model Number | BSP-12-4 12 Inch Subwoofer |
| Speaker Size | 12 inches |
| Speaker Maximum Output Power | 2800 watts (Max) |
| RMS Power | 1400 watts |
| Impedance | Dual 4 Ohm |
| Voice Coil | 3-inch Black Aluminum |
| Sensitivity | 88 dB |
| Frequency Response | 35-800 Hz |
| X-Max | 0.65 inches |
| Magnet Type | Dual Y35 (190 mm x 25 mm) |
| Cone Material | Paper Cone with Foam Edge |
| Basket Material | Black Aluminum |
| Connectivity Technology | Wired |
| Item Dimensions (D x W x H) | 12"D x 7"W x 12"H |
| Water Resistance Level | Not Water Resistant |
| Specific Uses For Product | In-car audio systems |

Image: Visual representation of the H YANKA BSP-12-4 subwoofer's core specifications.
9. Warranty and Support
H YANKA stands behind the quality of its products. Your BSP-12-4 subwoofer comes with the following warranty and support:
- Warranty: Enjoy a 1-year warranty from the date of purchase.
- Free Exchange: A 3-month free exchange period is provided for hassle-free protection.
For warranty claims, technical support, or any questions regarding your H YANKA subwoofer, please contact our customer service team through the retailer where you purchased the product or visit the official H YANKA website for contact information.