DISOUR BLS-B35 Bluetooth 5.1 Audio Receiver and Digital to Analog Audio Converter

1. Introduction

The DISOUR BLS-B35 is a versatile 2-in-1 audio adapter designed for both home and professional audio applications. It functions as a Digital to Analog Audio Converter (DAC) and a Bluetooth Audio Receiver, offering flexible connectivity options for various audio systems.

This device allows you to convert SPDIF Toslink digital audio signals into analog 2RCA L/R audio and 3.5mm AUX output. Additionally, its integrated Bluetooth 5.1 receiver enables wireless audio streaming from your smartphone, tablet, or other Bluetooth-enabled devices to wired speakers, car systems, wired headphones, or amplifiers.

2. Package Contents

Please check the box for the following items:

• 1x BLS-B35 Bluetooth Audio Adapter & DAC Converter
• 1x 3.5mm Aux Audio Cable
• 1x Type-C Charging Cable
• 1x Optical Fiber Cable (for Deluxe Version)
• 1x RCA Cable (for Deluxe Version)
• 1x User Manual

3. Product Overview

The BLS-B35 features multiple interfaces and controls for seamless audio management:

• Antenna: For stable Bluetooth signal reception.
• Toslink Input: Digital optical fiber input for DAC mode.
• RCA Output (L/R): Analog audio output for connecting to amplifiers, speakers, etc.
• AUX Output (3.5mm): Analog audio output for headphones, car audio, or other AUX-compatible devices.
• USB C Input (DC 5V): Power input for the device.
• U Disk Port (USB-A): For playing audio files directly from a USB flash drive.
• Indicator Lights: Display device status (e.g., power, Bluetooth connection).
• Buttons: Next, Play/Pause, Mode Switching, Last Song.
• Knob: Functions as power switch and volume adjustment.

4. Setup Instructions

4.1 Power Connection

1. Connect the provided Type-C charging cable to the USB C Input (DC 5V) port on the BLS-B35.
2. Connect the other end of the Type-C cable to a 5V USB power adapter (not included) or a USB port on your TV/PC.
3. The device will automatically power on when connected to power.

4.2 Connecting Audio Output

Choose one of the following methods to connect the BLS-B35 to your audio output device:

• RCA Output: Use an RCA cable (red and white connectors) to connect the RCA L/R OUT ports on the BLS-B35 to the corresponding input ports on your amplifier, active speakers, or home stereo system.
• 3.5mm AUX Output: Use the provided 3.5mm AUX audio cable to connect the AUX OUT port on the BLS-B35 to the AUX input on your headphones, car audio system, or other compatible speakers.

5. Operating Modes

The BLS-B35 supports three primary operating modes: Bluetooth Receiver, Digital to Analog Converter (DAC), and U-Disk Playback.

5.1 Bluetooth Receiver Mode

This mode allows you to stream audio wirelessly from your Bluetooth-enabled devices to your wired audio system.

1. Ensure the BLS-B35 is powered on and connected to your audio output device (speakers, amplifier, etc.).
2. Press the 'Mode Switching' button until the Bluetooth indicator light flashes, indicating pairing mode.
3. On your smartphone, tablet, or other Bluetooth device, search for available Bluetooth devices and select "BLS-B35" to pair.
4. Once paired, the Bluetooth indicator light will become solid. You can now play audio from your device, and it will be transmitted wirelessly to your connected audio system.
5. Dual Device Link: The BLS-B35 supports connecting two Bluetooth devices simultaneously. After pairing the first device, put the BLS-B35 back into pairing mode and connect the second device. You can then stream music from either device.
6. Auto-Connect: The receiver will automatically connect to the last paired Bluetooth device when powered on.
7. Controls: Use the volume knob to adjust the output volume. The 'Next' and 'Last' buttons can be used to switch songs, and the 'Play/Pause' button to control playback.

5.2 Digital to Analog Converter (DAC) Mode

This mode converts digital audio signals from sources like TVs or game consoles into analog audio for your speakers or headphones.

1. Ensure the BLS-B35 is powered on and connected to your analog audio output device (speakers, amplifier, etc.) via RCA or 3.5mm AUX.
2. Connect a digital audio source (e.g., TV, PC, PS4) to the Toslink Input port on the BLS-B35 using an optical fiber cable.
3. Press the 'Mode Switching' button until the DAC indicator light is solid.
4. Ensure your digital audio source is configured to output audio in PCM/LPCM format. The BLS-B35 supports sampling rates at 32, 44.1, 48, and 96KHz.
5. You should now hear audio from your digital source through your analog audio system.

5.3 U-Disk Playback Mode

Play audio files directly from a USB flash drive.

1. Insert a USB flash drive (U-Disk) containing supported audio files into the U Disk Port on the BLS-B35.
2. Press the 'Mode Switching' button until the U-Disk indicator light is solid.
3. The device will automatically detect and begin playing audio files.
4. Supported formats include WAV, WMA, APE, FLAC, and MP3.
5. Use the 'Next', 'Last', and 'Play/Pause' buttons to control playback. The volume knob adjusts the output volume.

6. Specifications

7. Troubleshooting

• No audio output:
  • Ensure the BLS-B35 is powered on and the indicator lights are active.
  • Verify all audio cables (RCA, AUX, Optical) are securely connected to both the BLS-B35 and your audio system.
  • Check that the correct input source is selected on your amplifier or speakers.
  • In DAC mode, ensure your digital audio source (e.g., TV) is set to output PCM/LPCM audio.
  • Adjust the volume knob on the BLS-B35 and your connected audio system.
• Bluetooth pairing issues:
  • Make sure the BLS-B35 is in Bluetooth pairing mode (Bluetooth indicator flashing).
  • Ensure your Bluetooth device is within the effective range (up to 20m barrier-free).
  • Turn off and on Bluetooth on your source device, then try searching and pairing again.
  • Clear previous Bluetooth connections on your source device if necessary.
• U-Disk not playing:
  • Ensure the U-Disk is properly inserted into the USB port.
  • Verify that the audio files on the U-Disk are in a supported format (WAV, WMA, APE, FLAC, MP3).
  • Try using a different U-Disk to rule out compatibility issues.
• Sound quality issues (noise, distortion):
  • Ensure all cables are properly shielded and not damaged.
  • Keep the device away from strong electromagnetic interference sources.
  • For Bluetooth, ensure you are within range and there are no significant obstacles.

8. User Tips

• Automatic Power On: The BLS-B35 automatically powers on when connected to a power source, making it convenient for use in cars or other setups where constant power is available.
• Stable Bluetooth Connection: The Bluetooth 5.1 chip provides a stable connection and wide signal range (up to 20 meters barrier-free), ensuring clear audio transmission.
• Connect Multiple Devices: Utilize the dual device link feature to connect both your smartphone and tablet simultaneously, allowing for flexible music streaming from either device.
• Auto-Reconnect: The device remembers and automatically reconnects to the last paired Bluetooth device, simplifying daily use.
• Built-in Antenna: The integrated antenna enhances signal stability and clarity, reducing noise for a better listening experience.

9. Maintenance

• Keep the device dry and away from moisture.
• Avoid extreme temperatures.
• Clean the device with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
• Do not attempt to disassemble or repair the device yourself, as this will void the warranty.

10. Warranty and Support

This product comes with a standard manufacturer's warranty. For detailed warranty information, technical support, or service inquiries, please refer to the seller's contact information or the official product page where you purchased the device.