Alctron DI2750N Stereo USB DI Active Box

1. Pengenalan

The Alctron DI2750N is a versatile stereo USB DI (Direct Injection) active box designed to seamlessly convert digital audio signals to analog. This device is engineered to eliminate common audio issues such as hum and buzz often encountered with computer headphone or line outputs. Featuring both USB and Bluetooth connectivity, the DI2750N offers high-speed transmission and plug-and-play convenience without requiring additional drivers. Its robust design provides exceptional shielding against noise, ensuring clean and reliable audio performance even over long cable runs. A built-in headphone amplifier allows for convenient monitoring.

2. Maklumat Keselamatan

• Jangan dedahkan unit kepada hujan atau kelembapan untuk mengelakkan kebakaran atau renjatan elektrik.
• Jangan buka casing. Tiada bahagian yang boleh diservis pengguna di dalamnya. Rujuk semua servis kepada kakitangan perkhidmatan yang berkelayakan.
• Elakkan meletakkan unit berhampiran sumber haba atau di bawah cahaya matahari langsung.
• Use only the specified power supply (USB 5V) to prevent damage.
• Keep the unit away from strong electromagnetic fields.
• Bersihkan hanya dengan kain kering.

3. Kandungan Pakej

Sila pastikan semua barang ada semasa membuka bungkusan:

• Alctron DI2750N Stereo USB DI Active Box
• Kabel USB (untuk kuasa dan data)
• Manual Pengguna (dokumen ini)

4. Ciri-ciri Produk

• Stereo USB DI active box for digital-to-analog audio conversion.
• Eliminates hum and buzz from computer headphone/line outputs.
• Bluetooth V4.0 for high-speed wireless audio transmission (up to 10m range).
• USB 2.0 full-speed compliance for plug-and-play operation (no drivers required).
• Balanced stereo Lo-Z (low impedance) XLR outputs for noise-free audio over long cable runs.
• Fon kepala terbina dalam amplifier for direct audio monitoring.
• Ground Lift switch to further reduce ground loop noise.
• Unique electronic circuit designed to handle high sound pressure and reduce distortion feedback.

5. Kawalan dan Petunjuk

Front Panel (Refer to Figure 2)

• USB Volume Knob: Adjusts the output level for audio received via USB.
• BT Volume Knob: Adjusts the output level for audio received via Bluetooth.
• BT Power Button: Press to turn Bluetooth on/off.
• Butang Tetapkan Semula: Resets the device.
• LED Status: Indicates the current operational status (e.g., power on, Bluetooth pairing).
• Caj LED: Menunjukkan status pengecasan bateri.
• Output Fon Kepala (3.5mm): Connect headphones for direct monitoring.
• Suis Mono/Stereo: Toggles between mono and stereo output modes for the headphone and XLR outputs.
• Port USB (Jenis-C): Connects to a computer for USB audio and power, or to a USB power adapter for charging.
• Antena: For Bluetooth wireless communication.

Panel Belakang (Rujuk Rajah 3)

• LEFT OUT (XLR): Balanced XLR output for the left channel.
• RIGHT OUT (XLR): Balanced XLR output for the right channel.
• Suis LIFT GROUND: Engages or disengages the ground connection to help eliminate hum and buzz caused by ground loops.

6. Panduan Persediaan

6.1 Menguasakan Peranti

1. Connect the supplied USB cable to the USB Type-C port on the DI2750N.
2. Connect the other end of the USB cable to a computer's USB port or a standard USB power adapter (5V). The Charge LED will illuminate when charging.

6.2 USB Audio Connection

1. Ensure the DI2750N is powered on.
2. Connect the USB cable from the DI2750N to your computer.
3. The DI2750N will be recognized as a standard audio device (USB 2.0 full speed) by your operating system without needing additional drivers.
4. Select the DI2750N as your audio output device in your computer's sound settings or audio software.
5. Adjust the USB Volume knob on the DI2750N to control the output level.

6.3 Sambungan Audio Bluetooth

1. Ensure the DI2750N is powered on.
2. Press the BT Power button on the front panel. The Status LED will blink, indicating it's in pairing mode.
3. On your Bluetooth-enabled device (e.g., smartphone, tablet, computer), search for available Bluetooth devices.
4. Select "DI2750N" from the list to pair. The Status LED will become solid once paired successfully.
5. Adjust the BT Volume knob on the DI2750N to control the output level.

6.4 Menyambung ke Sistem Audio

1. Connect XLR cables from the LEFT OUT and RIGHT OUT ports on the rear panel of the DI2750N to the balanced inputs of your mixer, audio interface, or PA system.
2. If you experience hum or buzz, try engaging the GROUND LIFT switch on the rear panel.

7. Arahan Operasi

7.1 Main Balik Audio

Once connected via USB or Bluetooth, play audio from your source device. The DI2750N will convert the digital signal to analog and send it to the XLR outputs. Use the respective volume knobs (USB or BT) to control the output level.

7.2 Monitoring with Headphones

Plug your headphones into the 3.5mm headphone output on the front panel. The headphone output mirrors the main XLR outputs. Use the USB or BT volume knobs to adjust the monitoring level, depending on your active input source.

7.3 Mono/Stereo Mode

The Mono/Stereo switch on the front panel allows you to select the output mode. In Stereo mode, the left and right channels are output separately. In Mono mode, both channels are summed to mono and sent to both XLR outputs, which can be useful for certain live sound applications or when only a single input is available on the receiving device.

8. Spesifikasi

9. Penyelesaian masalah

• Tiada Keluaran Bunyi:
  • Ensure the DI2750N is powered on and the Status LED is active.
  • Check all cable connections (USB, XLR, headphones).
  • Verify the correct input source (USB or Bluetooth) is selected and its volume knob is turned up.
  • Confirm the DI2750N is selected as the audio output device on your computer or Bluetooth device.
  • Check the volume levels on your source device and the connected audio system.
• Bunyi dengungan atau berdengung:
  • Engage the GROUND LIFT switch on the rear panel.
  • Ensure all audio cables are balanced XLR where possible.
  • Try connecting the DI2750N to a different USB port or power adapter.
  • Ensure the USB cable is not running parallel to power cables.
• Isu Berpasangan Bluetooth:
  • Ensure the DI2750N's BT Power button is pressed and the Status LED is blinking.
  • Make sure the Bluetooth device is within the 10m transmission range.
  • Turn off and on Bluetooth on your source device, then try pairing again.
  • If previously paired, try 'forgetting' the device on your source and re-pairing.
• Audio Herot:
  • Reduce the volume level on your source device or the DI2750N's volume knobs.
  • Ensure the input signal is not too hot (overdriving the DI box).

10. Petua Pengguna

• For optimal sound quality, always use balanced XLR cables for connecting the DI2750N to your audio system.
• When using the Ground Lift switch, experiment with both positions to find the one that provides the cleanest audio in your specific setup.
• Keep the DI2750N's firmware updated if updates become available from the manufacturer to ensure compatibility and performance improvements.
• Consider using a dedicated USB power adapter for the DI2750N if you experience noise when powering it directly from a computer's USB port, as some computer USB ports can introduce noise.

11. Penyelenggaraan

• Pembersihan: Gunakan kain lembut dan kering untuk membersihkan bahagian luar unit. Jangan gunakan pembersih cecair atau pelarut.
• Storan: When not in use for extended periods, store the DI2750N in a cool, dry place, away from direct sunlight and extreme temperatures.
• Penjagaan Kabel: Regularly inspect all cables for damage. Replace frayed or damaged cables immediately to prevent performance issues or safety hazards.

12. Waranti dan Sokongan

For warranty information and technical support, please refer to the official Alctron webtapak atau hubungi pengedar tempatan anda. Simpan resit pembelian anda sebagai bukti pembelian untuk sebarang tuntutan waranti.