1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your PIONEER TS-WX400DA 10-inch Slim Subwoofer. Please read this manual thoroughly before using the product to ensure correct usage and to prevent damage. Keep this manual for future reference.

Image 1.1: The PIONEER TS-WX400DA 10-inch Slim Subwoofer. This compact active subwoofer is designed to enhance in-car audio systems by providing deep bass.
The PIONEER TS-WX400DA is a compact amplified subwoofer designed to integrate with your vehicle's sound system, delivering enhanced bass performance. It features a built-in Class D amplifier for efficiency and offers selectable bass modes to customize your listening experience.
2. Safety Information
Observe the following safety precautions to prevent injury or damage to the product and vehicle:
- Professional Installation Recommended: Installation of car audio components requires technical knowledge and experience. If you are unsure, consult a qualified installer.
- Power Supply: Connect the subwoofer only to a 12V DC negative ground electrical system.
- Wiring: Ensure all wiring is securely connected and properly insulated to prevent short circuits. Use appropriate gauge wires as specified in the installation section.
- Fuse Protection: Always use the specified fuse rating. Never replace a fuse with one of a higher amperage, as this can cause fire or electrical damage.
- Placement: Install the subwoofer in a location that does not obstruct driving, interfere with safety devices (airbags), or impede vehicle operation. Ensure it is securely mounted to prevent movement during driving.
- Volume Levels: Avoid prolonged listening at excessively high volume levels, which can cause hearing damage.
3. What's in the Box
Verify that all components are present before beginning installation:
- (1) 9" x 5-1/2" subwoofer and built-in amplifier in sealed enclosure
- (1) Wire Harness
- (1) Wired Digital Bass Remote Control with attached 16.25' cable
- (1) 10A ATO fuse installed on power wire
- (2) Mounting feet and screws
4. Setup and Installation
The TS-WX400DA is designed for flexible installation in various vehicle applications, including under seats or in small spaces. Proper installation is crucial for optimal performance and safety.

Image 4.1: The compact design of the TS-WX400DA allows for versatile placement within a vehicle, such as under seats.
4.1. Choosing an Installation Location
Consider the following when selecting a mounting location:
- Accessibility: Ensure access for wiring and adjustments.
- Ventilation: Allow adequate airflow around the unit to prevent overheating.
- Security: The subwoofer must be securely fastened to prevent it from becoming a projectile during sudden stops or collisions.
- Dimensions: Refer to the product dimensions to confirm fitment in your chosen location.

Image 4.2: Dimensional diagram of the TS-WX400DA subwoofer, showing its compact size of 7.88"D x 11.75"W x 3.88"H (200mm D x 298mm W x 98mm H).
4.2. Wiring Connections
The TS-WX400DA features a built-in Class D amplifier and supports both RCA (low-level) and speaker-level (high-level) inputs.
- Power Connection: Connect the power wire (with the included 10A ATO fuse) directly to the vehicle's battery. Ensure a secure ground connection to the vehicle chassis.
- Remote Turn-On: Connect the remote turn-on wire to the remote output of your head unit. This will turn the subwoofer on and off with your car stereo.
- Audio Input:
- RCA Input: If your head unit has RCA pre-outs, connect them to the subwoofer's RCA inputs. An RCA splitter may be required if your head unit has only one subwoofer output.
- Speaker Level Input: If your head unit does not have RCA pre-outs, use the included wire harness to connect to your vehicle's speaker wires. You may need to cut the included cable end and split into positive (+) and negative (-) to connect the speaker input.
- Digital Bass Remote: Connect the wired remote control to the designated port on the subwoofer. This allows for convenient adjustment of bass levels and modes.
Note: For detailed wiring diagrams, refer to the owner's manual provided with the product.
5. Operating Instructions
Once installed, the TS-WX400DA offers customizable bass output through its selectable bass modes and remote control.

Image 5.1: The TS-WX400DA features two selectable bass modes: Deep and Dynamic, controlled via the wired remote.
5.1. Bass Modes
The subwoofer features two distinct bass modes to suit different music genres and preferences:
- Deep Mode: This mode provides a rich, deep bass quality, ideal for genres such as classical, jazz, and country music.
- Dynamic Mode: This mode emphasizes powerful, strong, and dynamic bass sounds, suitable for EDM, hip-hop, and rock music.
Switch between these modes using the wired digital bass remote control.
5.2. Gain and Frequency Adjustment
The wired remote control also allows for adjustment of the gain (volume) and frequency range of the subwoofer. Adjust these settings to blend the subwoofer's output seamlessly with your main speakers and to achieve your desired bass impact.

Image 5.2: Internal view of the TS-WX400DA, illustrating its integrated components and highlighting performance specifications like sensitivity and frequency response.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your subwoofer.
- Cleaning: Use a soft, dry cloth to clean the exterior of the subwoofer. Avoid using harsh chemicals or abrasive cleaners.
- Connections: Periodically check all wiring connections to ensure they are secure and free from corrosion.
- Ventilation: Ensure that the subwoofer's ventilation areas are not blocked by debris or other objects.
- Environmental Factors: Protect the subwoofer from extreme temperatures, direct sunlight, and excessive moisture.
7. Troubleshooting
If you experience issues with your TS-WX400DA, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from subwoofer |
|
|
| Distorted or weak bass |
|
|
| Subwoofer turns off intermittently |
|
|
If the problem persists after attempting these solutions, contact Pioneer customer support or a qualified service technician.
8. Specifications
Key technical specifications for the PIONEER TS-WX400DA 10-inch Slim Subwoofer:
| Feature | Specification |
|---|---|
| Model Number | TS-WX400DA |
| Speaker Type | Active Subwoofer |
| Woofer Diameter | 9 Inches (21 Centimeters Audio Driver Size) |
| Maximum Output Power | 250 Watts |
| Continuous Power Handling | 100 Watts |
| Amplifier Type | Built-in Class D |
| Frequency Response | 125 Hz (Note: Product description mentions 20Hz-100Hz for performance) |
| Sensitivity (Deep Mode) | 72 dB |
| Sensitivity (Dynamic Mode) | 73 dB |
| Input Voltage | 12 Volts (DC) |
| Connectivity Technology | RCA, Wired (Speaker Level) |
| Control Method | Remote |
| Product Dimensions (D x W x H) | 7.88" x 11.75" x 3.88" (200mm x 298mm x 98mm) |
| Item Weight | 8.81 Pounds |
| Material | IMPP |
| Color | Black |
9. Warranty and Support
Pioneer products are manufactured to high-quality standards. For warranty information, please refer to the warranty card included with your product or visit the official Pioneer website. For technical support or service inquiries, please contact Pioneer customer service through their official channels.
Pioneer Corporation
Manufacturer of the TS-WX400DA