Behringer Micromix MX400 Line Mixer User Manual

1. Introduction

The Behringer Micromix MX400 is an ultra-compact 4-channel line mixer designed for various audio applications. It provides high sonic quality and features ultra low-noise 4580 operational amplifiers for outstanding audio performance. This manual provides essential information for the safe and efficient operation of your MX400.

2. Important Safety Instructions

• Read these instructions.
• Keep these instructions.
• Heed all warnings.
• Follow all instructions.
• Do not use this apparatus near water.
• Clean only with dry cloth.
• Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.
• Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
• Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
• Only use attachments/accessories specified by the manufacturer.
• Unplug this apparatus during lightning storms or when unused for long periods of time.
• Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

3. Features

• Ultra-compact 4-channel line mixer.
• Highest sonic quality even at maximum output level.
• Input Level control for each channel.
• Power adapter included.
• High-quality components and exceptionally rugged construction ensure long life.
• Designed by BEHRINGER Germany.
• Pristine sound quality with ultra low-noise performance.
• Versatile input options using 1/4" TS connectors.
• Optimized signal integrity with minimum input impedance of 4.7 kOhms.
• Robust output capability with an output impedance of approximately 80 Ohms.
• Compact and portable design (1.83 x 2.25 x 4.06 inches).

4. Product Overview

Figure 1: Top view of the MX400, highlighting the four input level controls and the power indicator LED.

Figure 2: Rear view of the MX400, illustrating the 1/4" TS input and output jacks, along with the 12V power adapter input.

5. Setup

5.1 Unpacking

Carefully unpack your MX400 and check for any signs of damage. Ensure all components listed in the "What's in the Box" section are present.

• 4 Channel Mixer
• Power Adapter

5.2 Power Connection

1. Locate the included 12V power adapter.
2. Connect the power adapter's barrel connector to the 12V DC input jack on the rear of the MX400.
3. Plug the power adapter into a suitable AC power outlet. The "ON" LED on the front panel will illuminate, indicating the unit is powered on.

5.3 Audio Connections

The MX400 features four 1/4" TS (mono) input jacks and one 1/4" TS (mono) output jack.

1. Connect your audio sources (e.g., keyboards, drum machines, guitars with a preamp, other line-level devices) to the INPUT 1, INPUT 2, INPUT 3, and INPUT 4 jacks using 1/4" TS instrument cables.
2. Connect the OUTPUT jack of the MX400 to the input of your main mixer, audio interface, amplifier, or recording device using a 1/4" TS instrument cable.

Note: This is a mono mixer. For stereo sources, you will need to sum them to mono before connecting, or use two MX400 units for a stereo setup.

6. Operation

6.1 Level Controls

Each of the four input channels (INPUT 1-4) has an independent LEVEL control knob on the front panel. These knobs allow you to adjust the volume of each individual input source.

• Turn the knob clockwise to increase the input level.
• Turn the knob counter-clockwise to decrease the input level.

To achieve an optimal mix, start with all level knobs at their minimum position. Gradually increase the level of each input until the desired balance is achieved. Monitor your main mixer or recording device's input levels to prevent clipping or distortion.

6.2 Typical Applications

• Sub-Mixing: Use the MX400 to combine multiple line-level sources (e.g., several keyboards, drum machine outputs) into a single mono input on a larger mixer, conserving channels.
• Instrument Combining: Mix outputs from various electronic instruments before sending them to an amplifier or audio interface.
• Expanding Inputs: Add more inputs to an existing setup that has limited available channels.

7. Maintenance

• Cleaning: Disconnect the power adapter before cleaning. Use a soft, dry cloth to wipe the exterior of the unit. Do not use liquid cleaners or aerosols.
• Storage: If storing the unit for an extended period, disconnect all cables and the power adapter. Store in a cool, dry place away from direct sunlight and extreme temperatures.
• Ventilation: Ensure the unit has adequate ventilation and that no vents are blocked during operation.

8. Troubleshooting

9. Specifications

10. Warranty and Support

For warranty information and technical support, please refer to the official Behringer website or contact your local authorized dealer. Keep your purchase receipt as proof of purchase.

You can also find additional resources and frequently asked questions on the Behringer support pages.

Online Resources: www.behringer.com