1. Introduction
Thank you for choosing the DHRUVPRO XY-C50L Bluetooth 5.0 Wireless Audio Digital Power Amplifier Stereo Board. This compact and powerful amplifier module is designed to provide high-quality stereo audio output for a variety of applications, including DIY audio projects, home entertainment systems, and portable audio setups. Featuring Bluetooth 5.0 connectivity, AUX input, and USB audio playback, it offers versatile audio source options. Please read this manual carefully before operation to ensure proper setup and optimal performance.
2. Product Features
- High Power Output: 50W x 2 channels stereo output.
- Bluetooth 5.0: Stable and efficient wireless audio streaming with a transmission distance of up to 15 meters (unobstructed).
- Multiple Audio Inputs: Supports Bluetooth, AUX (3.5mm), and USB audio (U Disk/Sound Card).
- Rotary Encoder Control: Multifunctional knob for volume adjustment, play/pause, and power on/off.
- Wide Voltage Range: Operates on DC 5-24V power supply.
- Protection Mechanisms: Built-in reverse connection protection, short circuit protection, and self-recovery overheat protection.
- Compact Design: Small form factor suitable for various integrations.
3. Package Contents
Please verify that all items are present in your package:
- DHRUVPRO XY-C50L Amplifier Board
- Volume Knob
- Brass Standoffs (4 pcs)
- Screws (4 pcs)
- Heatsink
- DC Power Adapter (if included with your specific package)
Image showing the DHRUVPRO XY-C50L amplifier board along with its included accessories: a volume knob, four brass standoffs, four screws, a heatsink, and a DC power adapter.
4. Specifications
| Specification | Value |
|---|---|
| Brand | DHRUVPRO (XINYI Sini Audio) |
| Model | XY-C50L |
| Bluetooth Version | 5.0 |
| Number of Channels | 2 (Stereo) |
| Output Power (Max) | 50W x 2 (at 24V, 4Ω) |
| Supply Voltage | DC 5-24V |
| Compatible Speaker Impedance | 4Ω - 8Ω |
| Transmission Distance | Up to 15 meters (unobstructed) |
| Protection Features | Reverse connection, Short circuit, Overheat |
| U Disk File System | FAT32 (Max 32GB) |
| Mounting Type | Surface Mount |
Detailed product specifications including brand (XINYI Sini Audio), model (XY-C50L), Bluetooth version (5.0), transmission distance (15 meters), supply voltage range (DC 5-24V), protection mechanisms (reverse connection, short circuit, overheat), and output power ratings at different voltages (12V, 15V, 19V, 24V).
5. Setup
Follow these steps to set up your DHRUVPRO XY-C50L amplifier board:
- Connect Speakers: Connect your passive speakers to the 'SPKR L' and 'SPKR R' terminals. Ensure correct polarity (+ to + and - to -). This amplifier supports 8 ohm or 4 ohm speakers. For speakers less than 50W, consider reducing the power supply voltage or playback volume to prevent damage.
- Connect Power Supply: Connect a DC power supply (5-24V) to the 'DC: 5-24V' input terminals. Ensure correct polarity. A high-quality copper DC plug is recommended for long life.
- Install Heatsink: Attach the provided heatsink to the main chip on the board for optimal thermal management.
- Optional Audio Inputs:
- AUX Input: For wired audio, connect your audio source (e.g., phone, MP3 player) to the 'AUX IN' 3.5mm jack.
- USB Audio Input: Insert a USB flash drive (FAT32 format, max 32GB) into the 'USB AUDIO' port for direct playback, or connect to a computer for use as a USB sound card.
- 3.5mm Audio Output: If connecting to active speakers or another amplifier, use the 3.5mm audio output jack.
Diagram illustrating the connection points on the DHRUVPRO XY-C50L board: DC 5-24V power supply, left and right channel speaker outputs (passive speakers), 3.5mm audio output (active speakers), USB disk/sound card input, and AUX audio input. It also points out the rotary encoder functions for play/pause and power on/off.
Image highlighting key components and features of the DHRUVPRO XY-C50L board, including the free DC adapter, high-quality copper DC plug, free heatsink, and the rotary encoder for stepless tuning and one-button start/stop. It also notes that the U disk file system must be FAT32 and supports a maximum of 32GB.
6. Operating Instructions
The DHRUVPRO XY-C50L features a versatile rotary encoder for easy control:
- Power On/Off: Long press the rotary encoder knob to turn the device on or off.
- Volume Control: Rotate the knob clockwise to increase volume, counter-clockwise to decrease volume.
- Play/Pause: Short press the knob to play or pause audio playback.
- Mode Switching: The amplifier automatically detects the active audio input. If multiple inputs are connected, it will prioritize.
Bluetooth Connection:
- Ensure the amplifier board is powered on. The blue LED will flash quickly, indicating it is in Bluetooth pairing mode.
- On your mobile phone or Bluetooth device, search for available Bluetooth devices.
- Select 'Xinyi' from the list to connect. Do not connect to 'Sinilink-APP' directly from your phone's Bluetooth settings; this is for app control, not audio pairing. If accidentally connected, unpair and search again.
- Once connected, the blue LED will enter a long light state. When playing music, the blue LED will flash slowly.
Screenshot illustrating the Bluetooth connection process. It advises against connecting to 'Sinilink-APP' directly and instructs users to search for 'Xinyi' in their device's Bluetooth settings. It describes the LED indicator behavior during connection and playback.
7. Troubleshooting
If you encounter issues with your DHRUVPRO XY-C50L amplifier, refer to the following common problems and solutions:
- No Sound or Low Volume:
- Check power supply: Ensure the power supply voltage is within the 5-24V range and provides sufficient current. Insufficient power supply is a common cause of low volume or