1. Introduction
This manual provides detailed instructions for the setup, operation, maintenance, and troubleshooting of your Bp1048b2 DSP Electronic Frequency Division Bluetooth 5.0 Audio Amplifier. Please read this manual thoroughly before using the device to ensure proper functionality and to prevent damage.
2. Key Features
- DSP Electronic Frequency Division
- Bluetooth 5.0 Connectivity
- Audio Amplifier Functionality
- Pre-tuning Capabilities
- Computer Sound Card Integration
- TWS (True Wireless Stereo) Support
- Multiple Audio Input Modes: U-disk, Mobile OTG, Bluetooth 5.0, AUX, USB Digital Audio
- Advanced DSP Effects: 40-segment EQ, Bass Enhancement, Vocal Enhancement, Dynamic Range Compression (DRC), Low-cut/High-cut Filters, Crossover Effects, Delay, Sound Field Enhancement, Noise Suppression, 3D Sound Effects, Reverb, Exciter, MV Bass.
3. Package Contents
Please check the package for the following items:
- Bp1048b2 DSP Audio Amplifier Unit
- USB Cable (for power/data)
- (Other accessories may vary based on package contents)
4. Setup Instructions
4.1 Physical Connections
Connect the device as shown in the diagram below. Ensure all connections are secure before powering on.
- USB Input: Connect the provided USB cable to the USB port on the board (labeled "MK" or similar) and to a 5V power source (e.g., computer USB port, USB charger). This port also functions as a computer sound card input.
- Audio Output: The board features multiple audio output jacks, which can be configured for different setups such as low 2.1, 2.0 stereo, mono, or electronic 2-way frequency division. Connect your speakers or other audio equipment to these outputs as required by your audio system.
- Bluetooth Antenna: The integrated antenna (labeled "BT") provides Bluetooth 5.0 connectivity. Ensure no obstructions are near the antenna for optimal signal reception.
4.2 Software Installation and Tuning
The Bp1048b2 supports advanced audio tuning via a computer interface. The device is designed for "online tuning without driver installation" and saves your customized settings to a built-in "recording data storage chip".
To tune the device, connect it to a computer via the USB interface. The device should be recognized as a sound card. Specific tuning software or a web-based interface may be required for full access to DSP parameters. The seller notes that "more functions are not written, you can explore by yourself, plug-in can be used," suggesting a degree of user-discoverable functionality for advanced settings.
5. Operating Instructions
5.1 Power On/Off
The device powers on automatically when connected to a 5V USB power source. Disconnect the USB cable to power off the unit.
5.2 Bluetooth Pairing
- Ensure the Bp1048b2 is powered on.
- On your Bluetooth-enabled device (e.g., smartphone, tablet, computer), search for available Bluetooth devices.
- Select "Bp1048b2" (or a similar device name) from the list to initiate pairing.
- Once successfully paired, audio will be streamed wirelessly from your device to the amplifier.
5.3 TWS (True Wireless Stereo) Functionality
Two Bp1048b2 units can be paired together to create a True Wireless Stereo (TWS) sound system. The exact pairing procedure for TWS is typically as follows:
- Power on both Bp1048b2 units.
- Initiate TWS pairing mode on one unit (this may involve a long press of a button or a specific sequence, which can be explored as per the seller's note).
- The second unit should automatically connect or also be put into pairing mode.
- Once TWS is established between the two Bp1048b2 units, pair your audio source device to the primary Bp1048b2 unit.
5.4 Audio Input Modes
The device supports various audio input methods:
- U-disk Playback: Connect a USB flash drive (U-disk) containing audio files for direct playback.
- Mobile OTG Music: Connect a mobile device via an OTG (On-The-Go) cable for music playback.
- Bluetooth 5.0: Wireless audio streaming from Bluetooth-enabled devices.
- AUX Wired Input: Connect an external audio source using a standard AUX cable.
- USB Digital Audio Input: Connect to a computer via USB to use the Bp1048b2 as a digital sound card.
5.5 DSP Tuning and Effects
The Bp1048b2 features a powerful Digital Signal Processor (DSP) for comprehensive audio customization. Tuning is performed via a computer interface, and settings are saved to the device's internal memory.
- EQ (Equalizer): A 40-segment adjustable equalizer allows for precise control over the audio frequency spectrum. You can adjust pre-gain, filter types, gain, and Q factors for each segment.
- BASS Super Heavy Bass: Dedicated controls for enhancing low-frequency response.
- Vocal Enhancement: Adjustments to improve the clarity and presence of vocals.
- Dynamic Range Compression (DRC): Prevents audio clipping and manages the dynamic range of the sound. Parameters include DRC Mode, Crossover Frequency, Pregain, Threshold, Ratio, Attack time, and Release time.
- Anti-breakage: Features to protect against audio distortion and clipping.
- Low-cut/High-cut Filters: For precise frequency management and speaker protection.
- Crossover Effects: Essential for multi-speaker setups, allowing division of audio frequencies to appropriate drivers.
- Delay: Adjustable audio delay effects.
- Sound Field Enhancement: To broaden the perceived soundstage.
- Noise Suppression: Reduces unwanted background noise for cleaner audio.
- 3D Sound Effects (MV3D): Adjustable 3D sound intensity from 0-100%.
- Reverb: Adjustable parameters including Dry (0-200%), Wet (0-300%), Width (stereo width 0-100%), and Room Size (space size 0-100%).
- Exciter (Human Voice Exciter): Enhances vocal clarity and penetration. Cutoff Frequency: 1000-10000Hz. Dry/Wet: 0-100%.
- MV Bass: A virtual bass enhancement effect, particularly useful for small speakers. Cutoff Frequency: 30-300Hz. Intensity (low bass strength): 0-100%. Includes Bass Enhanced option.
6. Maintenance and Care
- Cleaning: Use a soft, dry cloth to clean the device. Do not use liquid cleaners, aerosols, or harsh solvents, as these may damage the components.
- Storage: Store the device in a cool, dry place away from direct sunlight, high humidity, and extreme temperatures.
- Handling: Avoid dropping or subjecting the device to strong impacts. Handle the circuit board by its edges to prevent damage to components.
- Power: Always use a stable 5V USB power supply. Using an incorrect voltage or unstable power source can damage the device.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power / Device not turning on | USB cable not connected properly or faulty; power source issue; device malfunction. | Check USB connection. Try a different USB cable or a known-good 5V USB power adapter. Ensure the power source is active. |
| No sound output | Incorrect audio connections; volume too low on source or amplifier; incorrect input mode selected; DSP settings muting output. | Verify all speaker and audio output connections. Increase volume on both the source device and the amplifier. Ensure the correct input mode (Bluetooth, AUX, USB, U-disk) is active. Check DSP settings for any unintended muting or extreme filtering. |
| Bluetooth pairing failure | Device too far from source; wireless interference; amplifier not in pairing mode; source device already connected to another Bluetooth device. | Move the audio source device closer to the amplifier. Restart both devices. Ensure no other devices are connected to the amplifier. Try re-initiating pairing mode on the amplifier. |
| Poor sound quality (distortion, static, weak audio) | Low quality audio source; incorrect DSP settings (e.g., extreme EQ, DRC); faulty cables; interference. | Use high-quality audio files or sources. Reset DSP settings to default or adjust EQ, DRC, and other effects carefully. Replace audio cables if necessary. Keep the device away from other electronic devices that may cause interference. |
| TWS pairing issues | Incorrect TWS pairing procedure; units too far apart; interference. | Follow TWS pairing steps carefully for both units. Ensure both units are within close range during pairing. Restart both units and try again. |
| Computer not recognizing device as sound card | USB cable issue; computer port issue; operating system conflict. | Try a different USB cable and a different USB port on your computer. Ensure your operating system is up to date. Check device manager for unrecognized devices. |
8. Specifications
| Feature | Detail |
|---|---|
| Model | Bp1048b2 |
| Bluetooth Version | 5.0 |
| Input Interfaces | U-disk, Mobile OTG, Bluetooth 5.0, AUX, USB Digital Audio |
| Output Interfaces | Low 2.1, 2.0 Stereo, Mono, Electronic 2-way Frequency Division |
| DSP Features | 40-segment EQ, Bass Super Heavy Bass, Vocal Enhancement, Dynamic Range Compression (DRC), Anti-breakage, Low-cut/High-cut Filters, Crossover Effects, Delay, Sound Field Enhancement, Noise Suppression, 3D Sound Effects (0-100% Intensity), Reverb (Dry 0-200%, Wet 0-300%, Width 0-100%, Room Size 0-100%), Exciter (Cutoff 1000-10000Hz, Dry/Wet 0-100%), MV Bass (Cutoff 30-300Hz, Intensity 0-100%) |
| Tuning Method | Online tuning via computer (no driver required) |
| Memory | Recording data storage chip for settings |
| Dimensions | Approx. 3.8 x 4.5 cm |
9. User Tips
- Experiment with DSP: The Bp1048b2 offers extensive DSP customization. Take time to experiment with the EQ, DRC, Reverb, and other effects to find the optimal sound profile for your specific speakers and listening environment.
- Optimal Bluetooth Performance: For the best Bluetooth connection and audio quality, keep your audio source device within close proximity to the amplifier and minimize physical obstructions between them.
- USB Audio Setup: When using the USB digital audio input, ensure your computer's sound settings are configured to output audio through the Bp1048b2 device.
- TWS Troubleshooting: If you encounter difficulties with TWS pairing, try powering off both units, then power them back on and attempt the pairing process again. Ensure they are close to each other.
- Power Source: Always use a reliable 5V USB power adapter to ensure stable operation and prevent potential damage to the device.
10. Warranty and Support
For warranty information and technical support, please contact the seller directly through the platform where you purchased the product. Keep your purchase receipt or order details as proof of purchase for any warranty claims.
