1. Introduction
The XY-C15H is a compact and versatile Bluetooth 5.0 wireless audio digital power amplifier stereo board, designed to provide high-quality audio amplification for various applications. With a 20W+20W output, it supports a wide DC 9-24V power supply and offers both Bluetooth and AUX audio input options. This manual provides detailed instructions for the proper setup, operation, and maintenance of your amplifier board.
2. Safety Information
- Ensure the power supply voltage is within the specified DC 9-24V range. Exceeding 12V for 4Ω speakers or 24V for 8Ω speakers can damage the device.
- Do not expose the board to moisture or extreme temperatures.
- Avoid short-circuiting the output terminals.
- Handle the circuit board with care to prevent damage from static electricity.
- Keep out of reach of children.
3. Package Contents
Verify that all items are present in your package:
- XY-C15H Amplifier Board
- Upper Cover
- Lower Cover
- Knob Cap
- M2*3 Screws (for assembly)
- Free DC Adapter (may vary)
4. Specifications
The following table details the technical specifications of the XY-C15H amplifier board:
| Feature | Specification |
|---|---|
| Brand | XINYI Sini Audio |
| Product Model | XY-C15H |
| Product Name | 20W+20W Bluetooth audio power amplifier board |
| Power Supply | DC 9-24V / 2A and above |
| Bluetooth Version | 5.0 |
| Transmission Distance | 15 meters (unobstructed) |
| Audio Input | Bluetooth + AUX |
| Volume Adjustment | High-end encoder knob adjustment |
| Adapted Speaker | 10W-100W / 4Ω-16Ω |
| Output Power | 20W * 2 |
| Protection Mechanism | Static electricity, overheating, overcurrent, short circuit protection |
| Unique Function | Support Sinilink-APP control |
| Product Size | 67mm x 47mm x 18mm |
| Product Weight | 40g |
| Operating Temperature | Normal |
Note:
- When using a 4Ω speaker, the power supply voltage should not exceed 12V.
- When using 8Ω speakers, the power supply voltage should not exceed 24V.
5. Product Overview
Familiarize yourself with the components and connection points of your XY-C15H amplifier board.
- DC 9-24V Power Supply: Input for power.
- SPKR +/-: Speaker output terminals for left (SPKL) and right (SPKR) channels.
- AUX INPUT: 3.5mm jack for auxiliary audio input.
- Volume Knob: Main volume control. Also functions as a button for play/pause (short press) and power on/off (long press).
6. Setup
Follow these steps to set up your XY-C15H amplifier board:
6.1 Assembly (Optional Enclosure)
If your package includes an enclosure, assemble it as follows:
- Place the circuit board onto the lower cover.
- Align the upper cover and secure it with the M2*3 screws.
- Attach the knob cap to the volume potentiometer shaft.
6.2 Electrical Connections
- Connect Speakers: Connect your passive speakers to the SPKL (Left) and SPKR (Right) terminals. Ensure correct polarity (+ to + and - to -). The board supports 4Ω-16Ω speakers.
- Connect Power Supply: Connect a DC 9-24V power supply (2A or above recommended) to the DC input jack. Pay attention to the voltage requirements based on speaker impedance (max 12V for 4Ω, max 24V for 8Ω).
- Connect AUX Input (Optional): If using a wired audio source, connect it to the AUX INPUT jack using a 3.5mm audio cable.
7. Operating Instructions
7.1 Power On/Off and Volume Control
- Power On: Long press the volume knob to turn the device on.
- Power Off: Long press the volume knob again to turn the device off.
- Volume Adjustment: Rotate the volume knob clockwise to increase volume, counter-clockwise to decrease volume.
- Play/Pause: Short press the volume knob to play or pause audio playback.
7.2 Bluetooth Connection
The amplifier board supports two modes of Bluetooth connection: direct pairing or via the Sinilink-APP.
Direct Bluetooth Pairing (Recommended for basic use)
- Ensure the Bluetooth board is powered on. The blue LED will flash quickly, indicating it's in Bluetooth connection mode.
- On your mobile phone or Bluetooth device, search for available Bluetooth devices.
- Select "Xinyi" from the list to complete the connection.
- Once connected, the blue LED will enter a long light state. You can now play audio from your device.
- During playback, the blue LED will flash slowly.
Important: Do NOT connect to "Sinilink-APP" directly from your phone's Bluetooth settings if you intend to use the "Xinyi" connection. If already connected, unpair and search again.
Connecting via Sinilink-APP
For advanced control and features, you can connect using the Sinilink-APP. Note that some phones may have compatibility issues if APP permissions are not fully granted.
- Download and install the Sinilink-APP on your mobile phone.
- Ensure all necessary APP permissions are enabled in your phone's settings, including location information.
- Open the Sinilink-APP and follow the in-app instructions to connect to the amplifier board.
8. User Tips
- Power Supply Matching: Always ensure your power supply voltage is appropriate for your speaker's impedance to prevent damage and ensure optimal performance. For 4Ω speakers, keep voltage at or below 12V. For 8Ω speakers, voltage can go up to 24V.
- Bluetooth Interference: If you experience intermittent Bluetooth connection, try moving your audio source closer to the amplifier board or away from other wireless devices.
9. Troubleshooting
If you encounter issues with your XY-C15H amplifier board, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound output | No power; Incorrect speaker connection; Volume too low; Incorrect input selected. | Check power supply and connections; Ensure speakers are correctly wired; Increase volume; Verify Bluetooth or AUX input is active. |
| Cannot connect via Bluetooth | Board not in pairing mode; Already connected to another device; Phone connected to "Sinilink-APP" directly; APP permissions not granted. | Ensure blue LED is flashing quickly; Disconnect from other devices; Unpair "Sinilink-APP" from phone's Bluetooth settings if using "Xinyi"; Grant all APP permissions if using Sinilink-APP. |
| Distorted or poor sound quality | Insufficient power supply; Speaker impedance mismatch; Overdriven input signal; Damaged speakers/cables. | Use a power supply with sufficient current (2A+); Ensure voltage matches speaker impedance; Reduce input volume from source; Check speaker and cable integrity. |
| Board overheats | Excessive volume/power output; Inadequate ventilation. | Reduce volume; Ensure proper airflow around the board, especially if enclosed. |
10. Maintenance
- Cleaning: Use a soft, dry cloth to clean the board. Do not use liquid cleaners or solvents.
- Storage: Store the amplifier board in a cool, dry place away from direct sunlight and moisture when not in use.
- Handling: Avoid touching the electronic components directly to prevent static discharge.
11. Warranty and Support
For any issues not covered in this manual or for further assistance, please contact the seller or manufacturer. Keep your purchase records for warranty claims.
12. Frequently Asked Questions (FAQ)
- Q: What can I use this item for?
- A: It can be used for wireless audio amplification, suitable for various DIY audio projects or upgrading existing sound systems.
- Q: What does the pattern of this look like?
- A: The item is distinguished by its MINI size, making it compact and easy to integrate into small spaces.
