1. Introduction
The BP1048B2 is a versatile DSP Audio Processor Board featuring Bluetooth 5.0 connectivity, digital crossover capabilities, TWS stereo support, and a USB sound card function. It allows for PC and mobile tuning, making it suitable for various audio applications requiring advanced sound processing and flexible input/output options.
2. Key Features
- Multi-Input Modes: USB OTG (play music from phones/tablets), Bluetooth 5.0 Dual Mode (seamless wired/wireless switching), AUX 3.5mm Wired Input (analog audio), USB Digital Signal Input (for high-fidelity audio decoding).
- Advanced Output Modes: 2.1CH Low-Pass Output (for subwoofer systems), 2.0CH Stereo Output, Mono Output, Electronic 2-Way Crossover (adjustable frequency bands).
- Wireless Connectivity: TWS Pairing (connect two modules wirelessly for stereo sound), Bluetooth 5.0.
- Interfaces & Controls: Type-C Port (for power, PC sound card tuning, or external USB), AUX Input (3.5mm jack), External Signal Booster Antenna Port (to enhance Bluetooth range), Physical Buttons (Volume ±, Play/Pause, Track Skip).
- On-the-Fly Tuning: Real-time tuning via mobile app (no drivers or burner required), settings saved to onboard chip (use a standard phone charger cable).
- Compact Design: Dimensions 3.8 x 4.5 cm (fits space-constrained setups).
3. Setup Guide
3.1 Package Contents
Ensure all components are present:
- BP1048B2 DSP Audio Processor Board
- (Optional: External antenna, cables, depending on purchase variant)
3.2 Board Layout and Connections
Refer to Figures 3 and 4 for the location of ports and connection points.
- Power Supply: Connect a 5V power source to the Type-C port. This port also serves for PC sound card tuning and external USB connections.
- Audio Input:
- Bluetooth: Ensure the board is powered on. It will automatically enter pairing mode.
- AUX Input: Connect an analog audio source to the 3.5mm AUX jack.
- USB OTG/Digital Input: Connect a compatible device (phone, tablet, PC) to the Type-C port for digital audio input.
- Audio Output: Connect your speakers or amplifier to the appropriate 3.5mm audio output jacks. The board supports 2.1CH Low-Pass, 2.0CH Stereo, and Mono configurations.
- External Antenna (Optional): If using an external Bluetooth antenna, connect it to the designated External Signal Booster Antenna Port to improve Bluetooth range.
- External Controls (Optional): For custom control, connect external buttons to the labeled points on the back of the board (e.g., Volume ±, Play/Pause, Track Skip).
4. Operating Instructions
4.1 Power On/Off
The board powers on automatically when a 5V power supply is connected to the Type-C port. Disconnect power to turn off.
4.2 Bluetooth Pairing
- Power on the BP1048B2 board.
- The board will enter Bluetooth pairing mode (indicated by an LED, refer to Figure 5).
- On your mobile device, search for Bluetooth devices and select "BP1048B2" (or similar name) to pair.
- Once paired, audio from your device will stream to the board.
4.3 TWS (True Wireless Stereo) Pairing
To achieve true wireless stereo, you will need two BP1048B2 modules. Follow the specific TWS pairing instructions provided by the manufacturer (usually involves a specific button press sequence on both modules).
4.4 USB Sound Card Functionality
Connect the Type-C port of the BP1048B2 to your PC or mobile device. The board will be recognized as a USB sound card, allowing for digital audio playback and tuning.
4.5 Mobile App Tuning
Download the dedicated mobile application for the BP1048B2. Connect your mobile device to the board via Bluetooth or USB. The app allows for real-time adjustment of DSP parameters, including equalizer, crossover settings, and more. Settings are saved directly to the onboard chip.
4.6 Physical Controls
Use the onboard or externally connected physical buttons for basic controls:
- Volume ±: Adjust audio output level.
- Play/Pause: Toggle playback.
- Track Skip: Skip to the next or previous track.
5. Maintenance
- Keep the board in a dry environment to prevent moisture damage.
- Avoid exposing the board to extreme temperatures.
- Clean the board gently with a dry, soft cloth. Do not use liquids or harsh chemicals.
- Ensure proper ventilation if integrating into an enclosure.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power indicator / Board not turning on | Incorrect power supply; Loose connection; Faulty Type-C cable | Ensure a stable 5V power supply is connected. Check Type-C cable and connection. Try a different cable or power source. |
| No sound output | Incorrect audio connections; Volume too low; Source device not playing; Incorrect input mode selected | Verify speaker/amplifier connections. Increase volume on both the board and source device. Check if the correct input mode (Bluetooth, AUX, USB) is active. |
| Bluetooth not pairing | Board not in pairing mode; Device too far; Interference; Already paired to another device | Ensure the board is powered on and in pairing mode. Move device closer to the board. Disconnect from other Bluetooth devices. |
| Mobile app not connecting | Bluetooth/USB connection issue; App not installed correctly; Firmware mismatch | Verify Bluetooth/USB connection. Reinstall the mobile app. Check for firmware updates for the board. |
7. Specifications
| Feature | Detail |
|---|---|
| Model | BP1048B2 |
| Type | Audio Processor Module |
| Bluetooth Version | 5.0 Dual Mode |
| Input Modes | USB OTG, Bluetooth 5.0, AUX 3.5mm, USB Digital Signal |
| Output Modes | 2.1CH Low-Pass, 2.0CH Stereo, Mono |
| Crossover | Electronic 2-Way (Adjustable frequency bands) |
| TWS Support | Yes |
| Tuning | Real-time via Mobile App, PC Sound Card Tuning |
| Power Interface | Type-C (5V) |
| Dimensions | 3.8 cm x 4.5 cm |
| Condition | New |
| Origin | Mainland China |
8. User Tips
- Stable Power: Always use a stable 5V power supply to ensure optimal performance and prevent unexpected behavior.
- Proper Grounding: When integrating the board into a larger audio system, ensure proper grounding to minimize noise and interference.
- Antenna Placement: For best Bluetooth range, position the external antenna (if used) away from metal obstructions.
- Mobile App Updates: Regularly check for updates to the mobile tuning app to access new features and performance improvements.
- Soldered Units: Note that soldered units are typically non-returnable. Plan your connections carefully before soldering.
9. Warranty and Support
This product comes with a 1-year warranty from the date of receipt. In case of defective merchandise within the warranty period, a full refund or replacement will be provided.
For technical support or warranty claims, please contact the seller's customer service or sales representative. They can assist with troubleshooting and provide an RMA number if a return is necessary.