Alctron DI2750N Bluetooth Stereo USB DI Box User Manual

1. Introduction

The Alctron DI2750N is a versatile stereo USB DI box designed for converting digital audio signals to analog. It offers both wired USB and wireless Bluetooth connectivity, providing flexibility for various audio setups. This device ensures high-speed transmission and exceptional shielding against noise, making it suitable for demanding audio environments. Its unique electronic circuit is engineered to handle high sound pressure, effectively reducing distortion feedback.

2. Safety Information

• Do not expose the device to rain, moisture, or extreme temperatures.
• Avoid placing the device near heat sources or in direct sunlight.
• Do not open the casing; refer all servicing to qualified personnel.
• Use only the specified power supply or USB connection for power.
• Keep out of reach of children.

3. Package Contents

Please check that all items are present in the package:

• Alctron DI2750N Stereo USB DI Box
• USB Cable
• User Manual (this document)
• (Additional accessories may vary by region or retailer)

4. Product Overview

The Alctron DI2750N features a compact design with intuitive controls and connectivity options. Familiarize yourself with the device's layout before operation.

Figure 1: Alctron DI2750N Stereo USB DI Box, showing the overall unit with antenna and front panel controls.

Figure 2: Detailed view of the Alctron DI2750N front panel, highlighting the USB and BT volume knobs, BT Power button, Reset button, Status and Charge indicators, Mono switch, Headphone output, and USB port.

4.1 Front Panel Controls and Indicators

• POWER: Main power switch for the unit.
• VOLUME USB: Adjusts the output volume for USB audio.
• VOLUME BT: Adjusts the output volume for Bluetooth audio.
• BT POWER: Button to turn Bluetooth on/off.
• RESET: Button to reset the device.
• STATUS LED: Indicates the operational status of the device.
• CHARGE LED: Indicates battery charging status.
• MONO Switch: Toggles between stereo and mono output modes.
• Headphone Output: 3.5mm stereo jack for headphone monitoring.
• USB Port: For connecting to a computer for audio and power.
• ANT: Bluetooth antenna.

5. Setup

5.1 Power Connection

1. Ensure the DI2750N is switched off.
2. Connect the supplied USB cable to the USB port on the DI2750N.
3. Connect the other end of the USB cable to a powered USB port on your computer or a USB power adapter. The CHARGE LED will illuminate if the internal battery is charging.

5.2 Audio Output Connection

Connect the analog outputs of the DI2750N to your mixing console, audio interface, or amplifier using appropriate XLR cables (not included).

5.3 Headphone Connection

For monitoring, connect your headphones to the 3.5mm headphone output jack on the front panel.

6. Operating Instructions

6.1 USB Audio Playback (Plug and Play)

1. Connect the DI2750N to your computer via the USB cable.
2. Turn on the DI2750N using the POWER switch.
3. Your computer should automatically recognize the DI2750N as an audio output device without requiring additional drivers.
4. Select "Alctron DI2750N" as your audio output device in your computer's sound settings or audio software.
5. Adjust the output volume using the VOLUME USB knob.

6.2 Bluetooth Audio Playback

1. Turn on the DI2750N using the POWER switch.
2. Press the BT POWER button to activate Bluetooth. The STATUS LED will blink, indicating pairing mode.
3. On your Bluetooth-enabled device (smartphone, tablet, etc.), search for available Bluetooth devices.
4. Select "Alctron DI2750N" from the list to pair. The STATUS LED will become solid when successfully paired.
5. Play audio from your device.
6. Adjust the output volume using the VOLUME BT knob.

6.3 Mono/Stereo Switch

Use the MONO switch to toggle between stereo and mono output modes as required by your audio setup. In mono mode, both left and right channels are summed to a single mono signal.

7. Maintenance

• Cleaning: Use a soft, dry cloth to clean the exterior of the device. Do not use liquid cleaners or solvents.
• Storage: When not in use for extended periods, store the device in a cool, dry place, away from direct sunlight and extreme temperatures.
• Battery: For optimal battery life, avoid fully discharging the unit frequently. Charge the unit periodically if stored for a long time.

8. Troubleshooting

9. Specifications

10. Warranty and Support

Alctron products are manufactured to high-quality standards. For warranty information and technical support, please refer to the warranty card included with your product or visit the official Alctron website. Keep your purchase receipt as proof of purchase.

For further assistance, please contact Alctron customer service.