1. Introduction
The XY-301W is a versatile 30W mono Bluetooth 5.2 TWS (True Wireless Stereo) audio amplifier board designed for home audio systems. It offers multiple input options including Bluetooth, AUX, and USB drive, providing stable wireless connectivity and high-fidelity sound quality. This manual provides detailed instructions for setting up, operating, and maintaining your amplifier board.
2. Specifications
| Feature | Specification |
|---|---|
| Product Name | TWS Bluetooth Digital Audio Amplifier Board |
| Product Model | XY-301W |
| Power Supply | DC 9-24V / 3A or higher |
| Bluetooth Version | 5.2 |
| Audio Inputs | Bluetooth, AUX, USB Drive |
| Bluetooth Audio Decoding | AAC/SBC |
| USB Lossless Decoding | WAV/FLAC/APE/MP3 |
| Audio Channels | MONO/TWS |
| Output Power (4Ω) | 20W @ 12VDC, 30W @ 16VDC |
| Output Power (8Ω) | 10W @ 12VDC, 30W @ 24VDC |
| Dimensions (Integrated Panel Version) | 56mm (L) x 52mm (W) x 23mm (H) |
| Knob Size | 17mm |
2.1 Product Overview
The XY-301W features a compact design with multiple interfaces for various audio setups. Key components include:
- USB Audio Port: For connecting USB drives.
- Speaker Terminals: For connecting speakers.
- DC 9-24V Power Input: For power supply.
- AUX IN: For wired audio input.
- Volume Knob: For adjusting audio output level.
- LED Indicators: For status indication (Bluetooth, TWS).
- Rear-mounted Heat Sink: For efficient cooling.
- Solid Capacitance: For stable performance.
- TWS BT Chip (AAC SBC): For True Wireless Stereo functionality.
Figure 1: XY-301W Amplifier Board Top View
Figure 2: Enhanced Design and Component Layout
3. Setup Instructions
3.1 Package Contents
Your package should contain the following items:
- 1 x XY-301W Power Amplifier Board
- 1 x Power Adapter (if included in your specific version)
- 1 x Screwdriver (for assembly)
- Necessary standoffs and screws for assembly
Note: The product is shipped unassembled. You will need to assemble the components using the provided screwdriver.
Figure 3: Package Contents
3.2 Assembly (if applicable)
If you received the unassembled version, carefully follow these steps:
- Attach the standoffs to the main amplifier board using the provided screws.
- Mount the top and bottom plates, ensuring all connections are accessible.
- If you have an external potentiometer version, connect it to the main board using the audio cable.
Figure 4: Different Product Versions and Assembly Components
3.3 Power Connection
Connect a DC 9-24V power supply (3A or higher recommended) to the DC 9-24V input port on the amplifier board. Ensure the polarity is correct.
3.4 Speaker Connection
Connect your speaker(s) to the SPEAKER +/- terminals on the board. Ensure correct polarity for optimal sound. This is a mono amplifier, so connect one speaker or wire multiple speakers in series/parallel as appropriate for a mono setup.
4. Operating Instructions
4.1 Input Options
The XY-301W supports three audio input methods:
- Bluetooth 5.2: For wireless audio streaming from your smartphone or other Bluetooth-enabled devices.
- AUX IN: For wired audio input using a 3.5mm audio cable.
- USB Drive: For playing audio files directly from a USB flash drive.
Figure 5: Multiple Input Options
4.2 Bluetooth Connection (Single Unit)
- Power on the amplifier board. The blue indicator light will flash rapidly.
- On your mobile phone or device, go to Bluetooth settings.
- Search for available devices and select "XinYi" to pair.
- Once connected, you can play music from your device.
Figure 6: Bluetooth Connection Tips
4.3 TWS (True Wireless Stereo) Stereo Pairing
To achieve stereo sound effects, you can pair two XY-301W amplifier boards using TWS technology:
- Power On: Power on both amplifier boards. The blue indicator lights on both boards will flash rapidly. (Ensure neither board is already paired with a Bluetooth phone or connected via AUX/USB drive).
- Initiate Pairing: On one of the amplifier boards, press the volume knob four consecutive times. The TWS red indicator light on this board will start flashing rapidly. The blue indicator light on the other board will continue to flash rapidly.
- Connection Confirmation: Wait for the TWS red indicator light on the first board to change from fast flashing to a solid ON state (this board is now the Master). The blue indicator light on the second board will turn off, and its red indicator light will start flashing slowly (this board is now the Slave). This indicates successful TWS connection. If the red indicator light goes out, the connection has failed; you can press the volume knob again four times to re-attempt TWS connection.
- Connect to Device: After successful TWS connection, open your phone's Bluetooth settings, search for "XinYi", and connect. Your phone's audio will now play in stereo through both amplifier boards. Alternatively, you can play music via AUX or USB drive through the Master unit.
Note: When using the TWS box function, it is necessary to first connect the TWS box and then pair it with the phone's Bluetooth. The TWS box function is in memory mode, and it will automatically connect to the box the next time it is turned on.
Video 1: TWS Stereo Pairing Demonstration
4.4 Volume Control
Rotate the volume knob clockwise to increase the volume and counter-clockwise to decrease it.
4.5 Sinilink APP Control
The Sinilink APP can be used to control the amplifier board, including changing the Bluetooth name and setting a pairing password. After making changes in the app, remember to click the "Set" button to apply them.
Figure 7: Sinilink APP Interface
5. 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.
- Ensure proper ventilation around the board to prevent overheating, especially during prolonged use at high volumes.
- Do not attempt to disassemble or modify the board beyond the intended assembly steps, as this may void any potential warranty and cause damage.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power / No indicator lights | Incorrect power supply voltage or current; Loose power connection. | Ensure power supply is DC 9-24V/3A or higher. Check all power connections are secure. |
| No sound output | Incorrect speaker wiring; Volume too low; Wrong input source selected; Bluetooth not connected. | Verify speaker connections and polarity. Increase volume. Select the correct input (Bluetooth, AUX, or USB). Reconnect Bluetooth if necessary. |
| TWS pairing fails | Incorrect pairing sequence; One board already connected to another device. | Ensure both boards are not connected to any other Bluetooth device or AUX/USB. Follow TWS pairing steps carefully (press volume knob 4 times on one unit). |
| Poor sound quality / Distortion | Incompatible speaker impedance; Low quality audio source; Overdriving amplifier. | Ensure speaker impedance matches amplifier specifications. Use high-quality audio files. Reduce volume to prevent distortion. |
| Bluetooth connection unstable | Distance too far; Obstructions; Interference. | Keep the Bluetooth device closer to the amplifier. Remove obstructions. Avoid strong electromagnetic interference. |
7. User Tips
- For optimal performance, use a stable power supply that meets or exceeds the recommended 9-24V/3A specifications.
- When connecting speakers, pay close attention to the impedance (4Ω or 8Ω) and voltage to ensure compatibility and prevent damage.
- Consider using the Sinilink APP for advanced control and customization of your amplifier's Bluetooth settings.
- If experiencing any issues, always double-check all physical connections before troubleshooting further.
8. Warranty and Support
For any technical support, warranty claims, or further inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.
