Important Safety Instructions
For your protection, read and understand all instructions before use. Keep this manual for future reference.
- Use: For household use only. Use only as described in this manual.
- Condition: Do not use if the product is damaged in any way.
- User: Intended for persons aged 18 and above. Persons with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, may use only under close supervision and if they understand the hazards involved.
Always prioritize safety. Contact the manufacturer with any questions.
Product Overview
The XY-C100L is a 100W x 2 APP Controlled Bluetooth Stereo Subwoofer Module with independent bass and treble adjustment. This amplifier board is designed for high-fidelity audio output, supporting various input methods and offering convenient control via a mobile application.
Key Features:
- Independent adjustment of high and bass for left and right channels, and independent adjustment of heavy bass.
- 360-degree stepless tuning for precise audio control.
- Mobile APP control (Sinilink) compatible with Android and iOS for visual operation and playback mode selection.
- Main knob utilizes a rotary encoder for smooth 360-degree stepless tuning, with a single press for start/stop and a long press for power on/off.
- Equipped with a Class-D power amplifier chip for high efficiency, low distortion, and anti-squeaking sound, ensuring transparent sound quality and strong driving force.
- Features a special thermal silica gel paste and a large area heat sink, close to the copper shell for doubled heat dissipation, ensuring full power and high-performance operation.
- Supports multiple audio input methods: Bluetooth 5.0, AUX, sound card input, and USB flash drive playback (FAT32 format, maximum 32GB).
Specifications
| Parameter | Value |
|---|---|
| Model | XY-C100L |
| Number of Channels | Left and right dual channels (stereo) |
| Applicable Horn Impedance | 4-8 Ohms |
| Applicable Horn Power | 30-300W |
| Power Supply Voltage | DC 5V ~ 26V (Higher voltage for greater output power) |
| Chip Solution | Class-D power amplifier chip |
| Bluetooth Version | 5.0 |
| Transmission Distance | 15m (unobstructed) |
| Volume Adjustment | Encoder 360 degrees stepless tuning |
| Audio Input | Bluetooth, AUX, USB Disk, USB Sound Card |
| USB Disk File System | FAT32 (Max 32GB) |
| Audio Output | Passive speaker, 3.5mm audio output |
| Output Power | 100W*2 |
| Output Filter | Filter free |
| Heat Dissipation Mode | Heat sink + shell |
| Protection Mechanisms | Power reverse connection protection, short circuit protection, self-recovery overheating protection |
| Mobile APP Support | Android/iOS (Sinilink) |
| Dimensions (with shell) | 58mm x 53mm x 18mm (2.2 x 2.1 x 0.7 inches) |
| Weight | 70g |
| Origin | Mainland China |
| Certification | None |
Output Power vs. Voltage:
| Voltage | 8 Ohm Output | 4 Ohm Output |
|---|---|---|
| 12V | 12W + 12W | 22W + 22W |
| 19V | 28W + 28W | 55W + 55W |
| 22V | 37W + 37W | 72W + 72W |
| 24V | 51W + 51W | 100W + 100W |
Note: The output power of the power supply should be greater than the output power of the amplifier, otherwise it may affect the sound quality.
Package Contents
The package includes:
- 1 x XY-C100L Amplifier Board
Installation
The amplifier board comes with a protective shell that needs to be assembled. Follow the diagram below for proper assembly:

Assembly Steps:
- Place the circuit board onto the lower cover.
- Attach the heat sink to the appropriate location on the circuit board.
- Secure the upper cover using the M2 screws and M2x14 copper pillars.
- Install the knob cap onto the rotary encoder shaft.
Ensure all connections are secure and components are properly aligned before powering on.
Connections
Refer to the connection diagram below for wiring the power supply, speakers, and audio input sources.

Wiring Instructions:
- Power Supply: Connect a DC 5-26V power supply to the DC input terminals. Ensure correct polarity.
- Passive Speakers: Connect your passive speakers to the SPKL (Left) and SPKR (Right) terminals. Observe the positive (+) and negative (-) polarities.
- Active Speakers: For active speakers, use the 3.5mm Audio Output jack.
- AUX Audio Input: Connect external audio devices (e.g., phone, MP3 player) via the AUX IN port.
- USB Disk/Sound Card Input: Insert a USB flash drive (FAT32, max 32GB) into the USB port for playback, or connect to a computer via USB for sound card functionality.
Operation
Main Knob Control:
The main knob on the amplifier board serves multiple functions:
- Rotate: Adjusts the volume (stepless tuning).
- Short Press: Plays or pauses the audio.
- Long Press: Turns the amplifier board on or off.
Audio Input Modes:
The amplifier supports Bluetooth, AUX, USB Disk, and USB Sound Card inputs. The device will automatically detect and switch to the active input or can be selected via the mobile APP.
Mobile APP Control (Sinilink)
The XY-C100L amplifier board can be controlled via the Sinilink mobile application, available for Android and iOS devices. This app allows for visual operation, playback mode selection, and independent adjustment of bass and treble.
APP Download:
Search for 'Sinilink' in your device's app store (e.g., Google Play Store for Android, Apple App Store for iOS) and download the application.
Connecting to the APP:
- Power On: Ensure the amplifier board is powered on. The blue LED will flash quickly, indicating it is in wireless connection mode.
- Enable Location (Android): For Android devices, you may need to turn on location information for the app to discover Bluetooth devices.

Figure 3: Enable Location for APP (Android) - Pairing: On your mobile phone, search for Bluetooth devices and select 'XinYi' to complete the connection. The blue LED on the board will enter a long light state once connected.
- Important Note: Do not connect to 'Sinilink-APP' directly from your phone's Bluetooth settings. If already connected, unpair it and search again. The correct device name to connect to is 'XinYi'.

Figure 4: Correct APP Connection Steps - Playback: Once connected, open your mobile phone's music player. The blue LED will flash slowly, indicating playback state.
Troubleshooting
- No Sound:
- Check power supply connection and voltage.
- Ensure speakers are correctly wired and functional.
- Verify audio input source is active and connected.
- Check volume levels on both the amplifier and the source device. - Distorted Sound:
- Reduce volume to check for clipping.
- Ensure power supply voltage is within the specified range (5-26V).
- Check speaker impedance matches the amplifier's requirements (4-8 Ohms).
- Ensure the power supply output is sufficient for the amplifier's output power. - Bluetooth Connection Issues:
- Make sure the amplifier is in pairing mode (blue LED flashing quickly).
- Ensure location services are enabled on your phone (for Android).
- Disconnect from 'Sinilink-APP' if previously paired incorrectly, and connect to 'XinYi'.
- Move closer to the amplifier to reduce interference. - USB Disk Not Playing:
- Ensure the USB disk is formatted to FAT32.
- Check that the USB disk capacity does not exceed 32GB.
- Verify audio files are in a supported format.
Maintenance
- Keep the amplifier board clean and free from dust. Use a soft, dry cloth for cleaning.
- Avoid exposing the device to moisture, extreme temperatures, or direct sunlight.
- Do not attempt to disassemble or repair the unit yourself, as this may void any potential warranty and could cause damage.
- Ensure adequate ventilation around the heat sink during operation to prevent overheating.
Warranty and Support
For detailed information regarding warranty, technical support, or service, please refer to the official user manual PDF provided by the manufacturer. A PDF version of the user manual is available for download: User Manual (PDF).
For further assistance, please contact the seller or manufacturer directly.





