CAD Audio Astatic M2 2-Channel Mixer with USB Interface User Manual

1. Introduction

The CAD Audio Astatic M2 is a versatile 2-channel analog mixer featuring two microphone/line inputs and a built-in USB interface. Designed for compact use, it is suitable for small venues, live performances, broadcasting, podcasting, and home recording. Its robust design and essential features make it a reliable tool for various audio applications.

2. Safety Information

Please read and understand all safety instructions before operating this device. Failure to do so may result in electric shock, fire, or other hazards.

• Do not expose this unit to rain or moisture.
• Do not open the casing. There are no user-serviceable parts inside. Refer all servicing to qualified personnel.
• Ensure the power source matches the requirements specified on the unit.
• Keep the unit away from heat sources and direct sunlight.
• Avoid placing heavy objects on the unit.

3. Package Contents

Verify that all items are present in the package:

• Astatic M2 2-Channel Mixer
• USB Cable
• Power Adapter

This image displays the Astatic M2 mixer alongside its essential accessories: a USB cable for data transfer and power, and a dedicated power adapter.

4. Product Overview

4.1. Front Panel Controls and Connections

This image provides a clear view of the mixer's front panel, highlighting the various knobs, faders, and input/output jacks for audio control.

• CH1 / CH2 (Mic/Line Inputs): Combo XLR/TRS jacks for connecting microphones or line-level instruments.
• +48V Phantom Power: Switch to enable phantom power for condenser microphones connected to CH1 and CH2.
• GAIN: Adjusts the input sensitivity for each channel.
• EQ (HI/LOW): 2-band equalizer for adjusting high and low frequencies of each channel.
• FX: Knob to control the amount of effect applied to the channel.
• CH1 / CH2 LEVEL: Adjusts the output level of each channel.
• MAIN OUT (L/R): 1/4" TRS outputs for connecting to main speakers or amplifiers.
• PHONE: 1/4" TRS output for connecting headphones.
• FX LEVEL: Adjusts the overall level of the effects.
• PC TO MAIN: Routes the USB audio input to the main mix.
• MAIN: Controls the overall output level of the main mix.
• Indicators (CLIP, SIG, POWER): LEDs to show signal presence, clipping, and power status.

4.2. Rear Panel Connections

This image shows the rear panel of the mixer, detailing the USB power input and the +48V phantom power switch.

• USB POWER (5V DC): USB-C port for power input. The unit can be bus-powered when connected to a computer.
• +48V ON/OFF Switch: Activates or deactivates phantom power for the XLR inputs.

5. Setup

5.1. Power Connection

1. Connect the provided USB cable to the USB POWER (5V DC) port on the rear panel of the mixer.
2. Connect the other end of the USB cable to the power adapter and plug it into a wall outlet, or directly to a computer's USB port for bus power.
3. Ensure the mixer powers on (POWER LED illuminates).

5.2. Connecting Microphones and Instruments

1. For microphones, connect an XLR cable to the CH1 or CH2 combo jack. For line-level instruments (e.g., keyboards, guitars with preamps), use a 1/4" TRS cable.
2. If using a condenser microphone, activate +48V Phantom Power using the switch on the rear panel. Ensure dynamic microphones do not receive phantom power.
3. Set the GAIN knob for each channel to its minimum position before connecting.

5.3. Connecting to a Computer (USB Audio Interface)

1. Connect the mixer to your computer using the provided USB cable. The mixer will function as a 16-bit/48kHz audio interface.
2. Your computer should automatically detect the mixer as an audio device. Select it as the input/output device in your operating system's sound settings or your preferred Digital Audio Workstation (DAW).

5.4. Connecting Output Devices

1. Connect your main speakers or amplifier to the MAIN OUT (L/R) 1/4" TRS jacks.
2. Connect your headphones to the PHONE 1/4" TRS output for monitoring.

6. Operating Instructions

6.1. Adjusting Input Levels

1. With your microphone or instrument connected, gradually increase the GAIN knob for the respective channel until the SIG LED illuminates consistently, but the CLIP LED only flashes occasionally during the loudest peaks. Avoid constant clipping to prevent distortion.
2. Use the HI and LOW EQ knobs to shape the tone of your input signal.
3. Adjust the CH LEVEL knob to set the individual volume of each channel within the main mix.

6.2. Using Effects (FX)

1. Turn the FX knob on each channel to send a portion of that channel's signal to the internal effects processor.
2. Adjust the FX LEVEL knob to control the overall volume of the applied effect in the main mix.

6.3. Main Mix and Monitoring

1. Use the MAIN knob to control the overall output volume sent to your main speakers/amplifier.
2. Adjust the PHONE knob to set the listening volume for your headphones.
3. The PC TO MAIN button allows you to route audio playing from your computer via USB directly into the main mix for playback or integration.

7. Maintenance

To ensure the longevity and optimal performance of your Astatic M2 mixer, follow these maintenance guidelines:

• Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Avoid abrasive cleaners, solvents, or waxes.
• Storage: Store the mixer in a cool, dry place away from direct sunlight and extreme temperatures.
• Handling: Always handle the unit with care. Avoid dropping or subjecting it to strong impacts.

8. Troubleshooting

If you encounter issues with your Astatic M2 mixer, refer to the following common problems and solutions:

9. Specifications

10. Warranty and Support

For warranty information and technical support, please refer to the documentation included with your product or visit the official CAD Audio website. Keep your purchase receipt as proof of purchase.