Introduction
The Feikeer 10" 1200W UnderSeat Car Subwoofer is designed to enhance your vehicle's audio system by providing deep, rich bass. This compact unit features a built-in amplifier, multicolor LED lighting, and various adjustable settings to customize your listening experience. It is engineered for seamless integration into most car models, offering a powerful audio upgrade without occupying significant space.

Figure 1: The Feikeer 10" 1200W UnderSeat Car Subwoofer, highlighting its stereo surround sound field and 1200W peak power capabilities. This image illustrates the internal components and the large caliber subwoofer for enhanced bass.
Key features include:
- Deep Bass Enhancement: Adds low-frequency depth for a fuller sound, complementing rhythmic tracks and allowing you to feel the music's pulse.
- Immersive Audio Experience: Elevates movie-watching by adding texture to cinematic soundtracks and enhancing tension with subtle bass undertones.
- Integrated Amplifier: Features a built-in amplifier, eliminating the need for external amplification.
- Multicolor LED Lighting: Customizable RGB lighting to match your vehicle's interior or personal preference.
- Space-Saving Design: Designed to fit conveniently under seats or in the trunk, minimizing space usage.
- DSP Noise Cancellation: Incorporates digital signal processing for clearer audio output.
- Robust Construction: Built with an aluminum alloy shell and strong thrust aviation magnets for durability.
What's in the Box
Upon unpacking your Feikeer 10" 1200W UnderSeat Car Subwoofer, please ensure all the following items are present:
- Feikeer 10" 1200W UnderSeat Car Subwoofer Unit
- Mounting Hardware (screws, brackets)
- Remote Bass Level Control Dial
- Remote Cable (Ethernet type)
- RCA Cables
- Power Wire
- Ground Wire
- Fuse and Fuse Holder
- Speaker Level Converter (for high-level input)
- Various Terminals and Connectors

Figure 2: All components included with the Feikeer 10" 1200W UnderSeat Car Subwoofer, laid out for easy identification. This includes the subwoofer unit, wiring kit, remote control, and mounting hardware.
Setup and Installation
Proper installation is crucial for optimal performance and safety. It is recommended to have this unit installed by a professional if you are unfamiliar with car audio wiring.
Mounting Location
The compact design allows for flexible mounting. Common locations include:
- Under a car seat (passenger or driver side)
- In the trunk of the vehicle
Choose a location that minimizes vibrations and allows for proper ventilation.

Figure 3: Illustration of potential mounting locations for the Feikeer 10" 1200W UnderSeat Car Subwoofer, including under the seat and in the trunk, demonstrating its space-saving design.
Wiring Connections
The subwoofer features various input and control terminals:
- Power (12V): Connect the red power wire from the subwoofer to the positive terminal of your car battery, ensuring an inline fuse is installed close to the battery.
- Ground (GND): Connect the black ground wire to a clean, unpainted metal surface on the vehicle's chassis.
- Remote (REM): This wire turns the subwoofer on/off with your head unit. If your head unit has a dedicated remote output, connect it here. If not, the unit supports auto power-on via high-level input.
- Inputs (Low Level/High Level):
- Low Level (RCA): For head units with RCA pre-outs, connect the provided RCA cables here.
- High Level (Speaker Level): If your head unit does not have RCA outputs, use the included speaker level converter to connect directly to your vehicle's speaker wires. This method also supports the auto power-on feature.
- Remote Control Port: Connect the remote bass level control dial here for convenient bass adjustment from the driver's seat.

Figure 4: Detailed view of the Feikeer 10" 1200W UnderSeat Car Subwoofer's connection panel, showing power, ground, remote, input options (RCA and high-level), and control knobs.
Operating Instructions
Once installed, you can fine-tune the subwoofer's performance using the controls on the unit or the remote dial.
Controls and Adjustments
- Gain: Adjusts the input sensitivity to match the output of your head unit. Start low and gradually increase until desired volume is achieved without distortion.
- Low-Pass Filter (LPF): Sets the upper frequency limit for the subwoofer. Typically set between 60-80Hz for optimal audio quality, ensuring lows are defined but not harsh.
- Bass Boost: Provides an additional boost to low frequencies. Adjust gradually to avoid overpowering the sound.
- Phase (0°/180°): Adjusts the phase of the subwoofer output relative to the main speakers. Experiment with both settings to find the one that provides the most cohesive bass response.
- Remote Bass Level Control: Use the included remote dial to conveniently adjust the bass output level from your driving position.
- Auto Power On: An option to automatically turn the subwoofer on/off when it detects an audio signal, useful when a dedicated remote wire is not available.
Multicolor LED Lighting
The subwoofer features multicolor RGB LED lighting. You can control the lighting via a dedicated app (e.g., "Lotus Lantern" mentioned in user reviews) on your smartphone (iPhone & Android compatible). This allows you to turn lights on/off, adjust brightness, and choose colors.

Figure 5: Demonstrates the multi-colorful RGB light control feature of the Feikeer 10" 1200W UnderSeat Car Subwoofer, showing smartphone app compatibility for light customization.
Maintenance
To ensure the longevity and optimal performance of your Feikeer subwoofer, consider the following maintenance tips:
- Avoid Prolonged High-Volume Use: While the subwoofer is powerful, continuous operation at maximum volume can reduce its lifespan and potentially damage your hearing.
- Proper Positioning: Ensure the subwoofer is positioned in a stable manner to minimize vibrations, which can affect sound quality and component integrity.
- Keep Clear of Obstructions: Do not block the subwoofer's speaker or ventilation areas to prevent overheating.
- Regular Cleaning: Periodically wipe down the unit with a soft, dry cloth to remove dust and debris.
Troubleshooting
If you encounter issues with your Feikeer subwoofer, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Subwoofer does not power on | No power, ground, or remote signal; blown fuse; incorrect wiring. | Check all power, ground, and remote connections. Verify the fuse is intact. Ensure the auto power-on feature is enabled if not using a remote wire. |
| No bass output or weak bass | Gain too low; LPF set too high/low; incorrect phase; input signal issue. | Adjust the Gain, LPF (recommended 60-80Hz), and Bass Boost. Experiment with the Phase switch (0°/180°). Check input connections (RCA or high-level). |
| Distorted sound | Gain too high; improper LPF setting; poor input signal. | Reduce the Gain. Adjust the LPF. Ensure the input signal from the head unit is clean and not clipping. |
| LED lights not working or not turning off | App connection issue; power supply to LED. | Ensure the app (e.g., Lotus Lantern) is correctly connected and controlling the lights. Check power supply to the LED circuit. |
| Subwoofer goes into "Protect" mode | Overheating; short circuit; impedance mismatch. | Allow the unit to cool down. Check all wiring for shorts. Ensure proper impedance matching if external speakers are connected. |
Specifications
Detailed technical specifications for the Feikeer 10" 1200W UnderSeat Car Subwoofer:

Figure 6: Dimensions of the Feikeer 10" 1200W UnderSeat Car Subwoofer, illustrating its slim profile for easy placement in confined spaces.
| Feature | Specification |
|---|---|
| Speaker Maximum Output Power | 1200 Watts |
| Speaker Size | 10 Inches |
| Mounting Type | Under Seat Subwoofer |
| Material | Metal (Aluminum Alloy Shell) |
| Product Dimensions (D x W x H) | 13.9" x 10.2" x 2.7" |
| Item Weight | 12.05 pounds (5.48 Kilograms) |
| Frequency Response | 500 Hz |
| Signal-to-Noise Ratio | 90 dB |
| Connectivity Technology | Auxiliary, RCA, USB (Wired) |
| Special Features | Bass Enhancement, LED Light |
| Color | Black |
| Power Source | Corded Electric |
| Surround Sound Channel Configuration | 2.1 |
| Water Resistance Level | Not Water Resistant |
Warranty and Support
Feikeer is committed to providing excellent customer satisfaction. This subwoofer comes with a convenient 1-year replacement warranty.
For any inquiries, technical assistance, or warranty claims, Feikeer provides professional after-sales support. We aim to reply to every customer's email within 24 hours to ensure you enjoy a smooth and enjoyable audio upgrade experience.
Please retain your proof of purchase for warranty purposes.