Riworal AT120S 12-Channel Wireless Audio Mixer User Manual

1. Introduction

Thank you for choosing the Riworal AT120S 12-Channel Wireless Audio Mixer. This professional DJ equipment console is designed to provide high-quality audio mixing with versatile connectivity options, including USB and Bluetooth. It features a built-in DSP digital chip for enhanced sound processing and is suitable for a wide range of professional audio applications. This manual will guide you through the setup, operation, and maintenance of your AT120S mixer.

2. Product Features

• 12 Input Channels: Provides ample connectivity for multiple microphones and line-level instruments.
• Wireless Bluetooth Playback: Stable and convenient transmission for audio streaming from compatible devices.
• USB Sound Board & MP3 Player: Supports multiple playback methods including USB drive, PC/Mac connection, and sound recording.
• DSP Digital Chip: Built-in for fast response and enhanced sound processing, including reverberation effects.
• 48V Phantom Power: Essential for connecting condenser microphones.
• 3-Band Equalizer (EQ): High, Middle, and Low frequency controls for precise tone shaping on each channel.
• Damping Slide Rail Faders: Comfortable and accurate adjustment of channel and master volumes.
• Monitor Function: Allows for headphone monitoring of individual channels (PFL/SOLO) or the main mix.
• LED Display: Multifunctional operation display for MP3/Bluetooth player and real-time channel status indication.
• Multiple Output Channels: Including Main Out (XLR, TRS) and Control Room outputs.

3. Specifications

Figure 3.1: AT120S Mixer Dimensions (61.5cm/24.2in Length, 33cm/13.3in Width, 3cm/1.1in Height)

4. Panel Introduction

Familiarize yourself with the various controls and connections on the AT120S mixer. Refer to the diagram below for a visual guide.

• MIC/LINE Inputs (1-12): XLR and 1/4" TRS jacks for microphones and line-level signals.
• GAIN Knob: Adjusts the input sensitivity for each channel.
• HIGH/MIDDLE/LOW EQ Knobs: 3-band equalizer for adjusting the tone of each channel.
• AUX Knob: Controls the send level to the auxiliary output for external effects or monitor mixes.
• PAN Knob: Adjusts the stereo position (left/right) of the channel signal.
• PFL/SOLO Button: Pre-Fader Listen / Solo button for monitoring individual channels through headphones.
• Channel Volume Faders: Adjusts the output level of each individual channel.
• EFFECTS Section: Controls for built-in digital effects.
• AUX/TAPE Input/Output: Additional stereo input/output for external devices.
• MP3/BT Player: Integrated player with LED display and control buttons (MENU, PREV, NEXT, PLAY/PAUSE, MODE).
• 48V PHANTOM POWER Switch: Activates phantom power for condenser microphones.
• MASTER METERS: LED indicators showing the main output level.
• MAIN OUT (L/R): XLR and 1/4" TRS outputs for connecting to main speakers.
• CTRL ROOM (L/R): Outputs for control room monitors.
• PHONES: Headphone output with dedicated volume control.
• USB Port: For connecting USB drives or to a computer for audio interface functionality.
• POWER ON/OFF Switch: Main power switch for the mixer.
• POWER PLUG: Connection for the external power supply.
• MIXER HEAT DISSIPATION HOLE: Ensures proper cooling of the unit.

5. Setup and Connections

Proper connection of your audio equipment is crucial for optimal performance.

5.1 Power Connection

1. Ensure the mixer's power switch is in the OFF position.
2. Connect the provided 12V-240V power supply to the POWER PLUG input on the rear of the mixer.
3. Plug the power adapter into a suitable electrical outlet.

5.2 Input Connections

Figure 5.1: Common Audio Cable Types

• Microphones: Connect dynamic or condenser microphones to the XLR inputs (MIC) on channels 1-12. If using a condenser microphone, ensure the 48V PHANTOM POWER switch is engaged (refer to Section 6.5).
• Line-Level Instruments: Connect instruments like electronic keyboards, guitars with preamps, or other audio devices to the 1/4" TRS LINE inputs on channels 1-12.
• External Audio Sources (e.g., CD Player): Use the AUX/TAPE input for stereo playback devices.
• USB Drive: Insert a USB flash drive containing MP3 files into the USB port for direct playback.
• Computer Connection: Connect the mixer to a computer via the USB port to use it as an audio interface for recording or playback.

5.3 Output Connections

Figure 5.2: Typical Connection Diagram

• Main Speakers: Connect your main powered speakers or power amplifier to the MAIN OUT (L/R) XLR or 1/4" TRS jacks.
• Control Room Monitors: Connect control room monitors to the CTRL ROOM (L/R) outputs.
• Headphones: Plug your headphones into the PHONES jack for monitoring.

6. Operating Instructions

6.1 Powering On/Off

1. Before powering on, ensure all channel faders and the main mix faders are at their lowest setting.
2. Flip the POWER ON/OFF switch to the ON position.
3. Power on any connected amplifiers or powered speakers after the mixer.
4. When powering off, reverse the order: power off amplifiers/speakers first, then the mixer.

6.2 Adjusting Input Gain

For each active input channel, slowly turn up the GAIN knob until the channel meter (1 LED signal indication) shows a strong signal without clipping (avoiding the CLIP LED). This sets the optimal input level.

6.3 Using the Equalizer (EQ)

Figure 6.1: 3-Band EQ Controls

Each channel features HIGH, MIDDLE, and LOW EQ knobs. Adjust these to shape the tone of the individual input. Turning a knob clockwise boosts the frequency, while turning it counter-clockwise cuts it. The center position is flat (no boost or cut).

6.4 Adjusting Channel Volume and Pan

• Channel Volume Faders: Use the individual channel faders to set the relative volume of each input in the mix.
• PAN Knob: Adjust the PAN knob to position the channel's sound between the left and right stereo outputs.

6.5 Activating 48V Phantom Power

Figure 6.2: 48V Phantom Power Switch

If you are using condenser microphones, press the 48V PHANTOM POWER switch to supply the necessary power. Ensure dynamic microphones are not connected when phantom power is active, as it can damage some dynamic microphones.

6.6 Using the MP3/Bluetooth Player

Figure 6.3: MP3/Bluetooth Player Interface

• Bluetooth Pairing:
  1. Press the MODE button on the MP3/BT player until "BT" or "Bluetooth" is displayed.
  2. On your device (smartphone, tablet), search for Bluetooth devices and select "BT-speaker" to pair.
  3. Once paired, you can stream audio wirelessly to the mixer.
• USB Playback:
  1. Insert a USB flash drive with audio files into the USB port.
  2. The player should automatically switch to USB mode. Use the PREV, NEXT, PLAY/PAUSE buttons to control playback.
• PC/MB (Computer) Playback/Recording: Connect the mixer to your computer via USB. The mixer will function as an audio interface, allowing you to play audio from your computer through the mixer or record the mixer's output to your computer.
• Sound Recording: The mixer supports direct sound recording to a USB drive. Refer to the player's menu for specific recording functions.

6.7 Using Effects

The mixer includes built-in digital effects. Use the EFFECTS controls to select and adjust the desired effect (e.g., reverberation). The AUX knob on each channel can be used to send a portion of that channel's signal to the effects processor.

6.8 Monitoring

• Headphones: Use the PHONES jack and its dedicated volume control to monitor the main mix or individual channels (when PFL/SOLO is engaged).
• PFL/SOLO: Pressing the PFL/SOLO button on a channel sends that channel's pre-fader signal to the headphones, allowing you to listen to it in isolation without affecting the main mix.

6.9 Adjusting Main Mix

Once individual channel levels are set, use the MAIN L/R faders to control the overall output volume of the mixer. Monitor the MASTER METERS to ensure the signal does not clip.

7. Maintenance

• Cleaning: Regularly wipe the mixer's surface with a soft, dry cloth. Avoid using abrasive cleaners or solvents.
• Dust Protection: Keep the mixer covered when not in use to prevent dust accumulation, especially in faders and knobs.
• Environmental Conditions: Operate and store the mixer in a dry environment, away from direct sunlight, extreme temperatures, and excessive humidity.
• Cable Management: Ensure cables are neatly organized and not under tension to prevent damage to connectors and ports.
• Ventilation: Do not block the mixer's heat dissipation holes (located on the rear) to ensure proper airflow and prevent overheating.

8. Troubleshooting

9. User Tips

• Gain Staging: Always set your input GAIN levels first, ensuring a strong signal without clipping, before adjusting channel faders and then the main mix faders. This prevents noise and distortion.
• Headphone Monitoring: Utilize the PFL/SOLO function with headphones to fine-tune individual channel EQs and gain settings without affecting the live mix.
• Effect Usage: Start with subtle effect levels and gradually increase them to avoid overwhelming the mix.
• Cable Quality: Invest in good quality, shielded audio cables to minimize interference and ensure clear sound transmission.
• Bluetooth Name: The Bluetooth name for pairing is typically "BT-speaker".

10. Warranty and Support

The Riworal AT120S Audio Mixer comes with a 1-year warranty from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use.

For warranty claims, technical support, or any questions regarding the operation of your mixer, please contact the seller or authorized service center. Please retain your proof of purchase for warranty validation.