1. Introduktion
The XY-C50L is a versatile 50W x 2 digital amplifier module designed for stereo audio applications. It supports multiple audio input methods including Bluetooth 5.0, AUX, USB flash drive, and computer USB sound card functionality. This module offers mobile APP control for visual operation and playback mode, making it a convenient solution for powering passive or active speakers.

Figur 1: Forside og bagside view of the XY-C50L amplifier modul.
2. Specifikationer
| Feature | Specifikation |
|---|---|
| Model | XY-C50L |
| Strømforsyning Voltage | DC: 8~24V |
| Bluetooth version | 5.0 |
| Transmissionsafstand | 15 m (no shielding) |
| Antal kanaler | Left and right double channels (stereo) |
| Adapter Horn (Speakers) | 0W~200W, 4 ohm, 8 ohm, 16 ohm |
| Maksimal effekt pr. kanal | 50 W |
| Beskyttelsesmekanisme | Power reverse connection protection, short circuit protection, self-recovery overheating protection |
| Complimentary Features | Mobile APP control (Android/iOS) |
| Størrelse | 53x52x16mm / 2.1x2x0.63in |
| Vægt | 60 g |
Output Power by Voltage:
- 12V: 8 Ohms / 15W+15W, 4 Ohms / 20W+20W
- 15V: 8 Ohms / 18W+18W, 4 Ohms / >30W+30W
- 19V: 8 Ohms / 32W+32W, 4 Ohms / >45W+45W
- 24V: 8 Ohms / 40W+40W, 4 Ohms / >50W+50W

Figure 2: Model comparison and detailed specifications.
3. Opsætning
3.1 Valg af strømforsyning
- The product requires a power supply range of 5-26VDC.
- It is compatible with standard 5.5-2.1/2.5 power adapter plugs.
- A 12V/24V standard power adapter with a current output of 4A or more is recommended.
- The size of the power supply is related to the power of the speaker. For exampHvis du bruger en 4 ohm 100W højttaler og en 24V strømforsyning, skal strømmen være mindst 6A. Hvis strømmen er for lille, kan lyden sidde fast. Skru ned for lydstyrken og reducer udgangseffekten for at løse dette problem.
- Strømforsyningen voltage cannot be higher than 26V, otherwise the circuit board will be burned.
- If the horn does not play when the power is turned on, but keeps making a ticking sound, which is caused by insufficient power supply, just increase the power supply.
3.2 Valg af højttaler
- This product can continuously output 50W*2 power amplivligere.
- 10W~200W speakers can be driven, and 8 ohms or 4 ohms speakers are recommended.
- If the power is within 50W of the speaker, use an appropriately lower power supply voltage (such as 12V power supply) or turn down the playback volume.
- For speakers over 50W, a higher power supply voltage (less than 26V) is better.
3.3 Forbindelser
Connect your power supply, speakers, and audio input sources (AUX, USB, or computer USB) to the corresponding ports on the amplifier board. Ensure correct polarity for power and speaker connections.

Figure 3: Connection diagram for the amplivligere bræt.

Figur 4: Eksample setup with amplifier connected to speakers and power.
4. Betjening
4.1 Tænd/sluk og lydstyrkekontrol
- The rotary encoder knob controls volume. Rotate it for stepless tuning.
- Short press the encoder knob to pause or start playback.
Video 1: Demonstration of sound quality and encoder operation (pause/play).
4.2 Lydinputtilstande
The module supports the following audio input methods:
- Bluetooth 5.0: Par din enhed med amplifier module via Bluetooth.
- AUX: Connect an audio source using a 3.5mm AUX cable.
- USB-stik: Insert a USB flash drive (FAT32 format, max 32GB) into the USB port. Open the Sinilink APP and switch to "USB flash drive" mode.
- Computer USB Sound Card: Tilslut amplifier board to your computer using a data cable. Open the Sinilink APP and click "Sound card" to activate this mode. The computer's audio will then play through the connected speakers.
4.3 Mobile APP Control (Sinilink)
De amplifier module can be controlled via the Sinilink mobile application, available for Android and iOS devices. Søg efter 'Sinilink' in your device's app store (e.g., Google Marketplace) to download.
- Download og installer: Søg efter 'Sinilink' in your app store and install it.
- Aktivér tilladelser: Ensure all necessary app permissions are granted in your phone settings to avoid connection issues.
- Opret forbindelse til enhed:
- Open the Sinilink APP.
- Click the small yellow dot (First step).
- Click to connect the wireless device (Second step).
- Søg efter the wireless device and connect to Sinilink-APP (Third step).
- Once connected, the connection succeeded message will appear (Fourth step).
- Visual Operation: The APP provides a visual interface for playback control, including volume, sound effects, song navigation, play/pause, and mode selection.

Figure 5: Mobile APP control interface.

Figure 6: Step-by-step guide for connecting to the mobile APP.

Figure 7: Sinilink APP visual operation playback mode.
5. Vedligeholdelse
To ensure optimal performance and longevity of your XY-C50L amplifier module, follow these general maintenance guidelines:
- Rensning: Brug en blød, tør klud til at rengøre modulet. Undgå at bruge væsker eller slibende rengøringsmidler.
- Miljø: Operate the module in a dry, well-ventilated area, away from direct sunlight, excessive heat, and moisture.
- Forbindelser: Kontrollér regelmæssigt alle forbindelser for at sikre, at de er fastgjorte og fri for korrosion.
- Opbevaring: If storing the module for an extended period, disconnect it from power and store it in a cool, dry place.
6. Fejlfinding
6.1 Signal Problems (Bluetooth/Wireless)
If you cannot find Bluetooth when using the module, or cannot connect to Bluetooth, consider the following:
- Hold dig væk fra routeren, når du bruger den.
- Avoid using it on a metal table, which can affect the PCB antenna signal.
- If you refit the speaker, and it is a metal shell, you must lead the antenna out of the shell. The metal shell will shield the signal.
6.2 Audio "Hiccup" Phenomenon
If music playback experiences a "hiccup" phenomenon:
- First, consider if the power supply is insufficient. Use a larger power supply.
- Second, consider if the power amplifier is overheating. Strengthen heat dissipation or turn down the playback volume.
6.3 Ingen lyd eller lav lydstyrke
- Sørg for, at strømforsyningen voltage is within the 8-24V range and provides sufficient current (e.g., 4A or more for 12V/24V).
- Check all audio input and speaker connections for proper seating and polarity.
- Verify that the correct audio input mode is selected (Bluetooth, AUX, USB, or Sound Card).
- Adjust the volume knob on the module and ensure your audio source device's volume is also turned up.
7. Brugertips
- For best sound quality, ensure your power supply provides stable voltage and sufficient current for your chosen speakers.
- When using a USB flash drive, make sure it is formatted to FAT32 for compatibility.
- If experiencing any interference, try relocating the module away from other electronic devices or power cables.
- The mobile APP offers advanced control; explore its features for sound adjustments and mode switching.
8. Garanti og support
For technical support, troubleshooting assistance, or warranty inquiries, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.





