Doslnlya XR-4 Professional 4-Channel DJ Mixer

Introduction

The Doslnlya XR-4 is a professional 4-channel DJ mixer designed for various audio applications including live streaming, recording, karaoke, and DJ mixing. It features built-in DSP effects, Bluetooth 5.0 connectivity, USB recording capabilities, and +48V phantom power for condenser microphones. This manual provides detailed instructions for setting up, operating, and maintaining your XR-4 mixer.

Product Features

• 4-Channel Mixing Input: Supports dual XLR microphones, stereo line inputs, and USB audio.
• OTG Direct Connection: Enables lossless live streaming, recording, karaoke, and DJ mixing with mobile phones and computers (OTG adapter sold separately).
• Multiple Power Supply Modes: Operates with 5V/2A power sources such as laptops, USB power adapters, or power banks, suitable for outdoor use.
• Dual Monitoring System: Features two 6.5mm headphone monitoring interfaces for real-time audio monitoring and precise control.
• 99 DSP Sound Effects: Integrated professional-grade reverb and digital effects for diverse atmospheric scenes.
• Loopback Function: Mixes computer sound card output with external audio sources for zero-latency live sound synthesis.
• +48V Phantom Power & PAD Attenuation: Available on dual microphone channels for driving condenser microphones and managing input levels.
• Independent Adjustment Knobs: Provides vocal enhancement, noise reduction, and high-fidelity stereo output.
• Compact Industrial Design: Portable black body (18 × 16.7 × 4cm) with clear functional zoning and power safety protection.

Setup Guide

1. Power Connection

Connect the mixer to a 5V/2A USB power source using the provided USB cable. This can be a laptop, a USB power adapter, or a power bank. Ensure the power source meets the 5V/2A requirement for stable operation.

Figure 1: Power supply and various device connections to the mixer.

2. Audio Input Connections

• Microphones: Connect XLR microphones to MIC1 or MIC2 inputs. For condenser microphones, activate the +48V phantom power switch.
• Stereo Line Inputs: Connect instruments or other audio devices to the STEREO (CH3/4) inputs using 1/4-inch TRS cables.
• USB Audio: Connect the mixer to a computer via USB for digital audio input and output.

Figure 2: Detailed view of mixer input and output connections.

3. Output Connections

• Main Output: Connect to active speakers or an amplifier using the MAIN L/R outputs.
• Headphones: Connect 6.5mm headphones to the PHONE jack for monitoring.

Operating Instructions

1. Controls Overview

Familiarize yourself with the mixer's controls:

• GAIN: Adjusts the input sensitivity for each channel.
• HIGH/LOW EQ: Two-band equalizer for adjusting treble and bass frequencies.
• EFF: Sends signal to the internal DSP effects processor.
• LEVEL: Adjusts the output volume for each channel.
• PROGRAM: Selects one of the 99 DSP effects.
• EFF RET: Adjusts the return level of the effects.
• MAIN L/R: Controls the overall main output volume.
• PHONE: Adjusts the headphone monitoring volume.

Figure 3: Mixer control layout and functions.

2. Bluetooth Pairing

To connect a Bluetooth device:

1. Press the MODE button on the mixer's digital display section until "Bluetooth" mode is selected.
2. On your mobile phone or tablet, search for available Bluetooth devices and select "XR-4".
3. Once paired, you can stream audio wirelessly to the mixer.

Figure 4: Bluetooth 5.0 connectivity for wireless audio streaming.

3. USB Playback and Recording

The mixer supports USB flash drive playback and direct USB recording to a computer.

• USB Playback: Insert a USB flash drive into the USB port. Use the MODE button to select USB playback.
• USB Recording: Connect the mixer to a computer via USB. The mixer acts as a sound card, allowing you to record mixed audio directly to your computer.

Figure 5: USB and OTG playback/recording functionality.

4. DSP Effects

The XR-4 mixer includes 99 digital signal processing (DSP) effects.

1. Use the PROGRAM knob to browse through the available effects (1-99).
2. Press the PROGRAM knob to select an effect.
3. Adjust the EFF knob on individual channels to send audio to the effects processor.
4. Use the EFF RET knob to control the overall level of the applied effect.

Figure 6: DSP effects selection and control.

5. +48V Phantom Power

For condenser microphones, activate the +48V phantom power switch located near the MIC1 and MIC2 inputs. Ensure dynamic microphones are not connected when phantom power is active, as this may cause damage.

Figure 7: Activating +48V phantom power.

6. Monitoring

Connect headphones to the 6.5mm PHONE jack to monitor the mixed audio in real-time. Adjust the PHONE volume knob to set the desired monitoring level.

Figure 8: Headphone monitoring setup.

7. Live Streaming and Recording (OTG)

The mixer supports direct connection to mobile phones and computers for live streaming and recording via OTG (On-The-Go) functionality. An OTG adapter is required for mobile device connections and is sold separately.

Figure 9: Computer and mobile phone recording function.

Figure 10: Direct-to-computer connection for recording.

Maintenance

To ensure the longevity and optimal performance of your Doslnlya XR-4 mixer, follow these maintenance guidelines:

• Cleaning: Use a soft, dry cloth to clean the exterior of the mixer. Avoid using abrasive cleaners, solvents, or waxes.
• Storage: Store the mixer in a cool, dry place away from direct sunlight, extreme temperatures, and high humidity.
• Handling: Handle the mixer with care. Avoid dropping it or subjecting it to strong impacts.
• Ventilation: Ensure proper ventilation around the mixer to prevent overheating. Do not block any ventilation openings.
• Power Off: Always power off the mixer and disconnect it from the power source when not in use or during cleaning.

Troubleshooting

If you encounter issues with your XR-4 mixer, refer to the following common troubleshooting steps:

• No Sound Output:
  • Check all cable connections to ensure they are secure.
  • Verify that the main output level and individual channel levels are turned up.
  • Ensure connected speakers or headphones are powered on and functioning correctly.
  • Check the input source (microphone, instrument, USB, Bluetooth) is active and sending a signal.
• Microphone Not Working:
  • For condenser microphones, ensure +48V phantom power is activated.
  • Check microphone cable integrity.
  • Adjust the GAIN knob for the microphone channel.
• Bluetooth Connection Issues:
  • Ensure the mixer is in Bluetooth mode.
  • Make sure the Bluetooth device is within range and not connected to another device.
  • Try restarting both the mixer and the Bluetooth device.
• USB Recording Problems:
  • Ensure the USB cable is properly connected to both the mixer and the computer.
  • Verify that the mixer is selected as the audio input device in your computer's sound settings and recording software.
  • Check that the USB port on your computer is providing sufficient power.
• Distorted Sound:
  • Reduce the GAIN levels on input channels to prevent clipping (indicated by red peak lights).
  • Lower the main output level.
  • Check for faulty cables or connections.

Specifications

Product Overview Video

Warranty and Support

The Doslnlya XR-4 mixer comes with a 30-day return and exchange policy. For further support or inquiries, please refer to the seller's contact information or the official Doslnlya website.