Introduction
The Audio Array BE-4 is a versatile 4-channel hybrid USB summing audio mixer designed for various audio applications, including podcasting, music production, live streaming, and compact studio setups. It features 4 analog and 2 digital channels, 99 DSP effects, and supports high-resolution 192kHz/24-bit OTG recording. This manual provides detailed instructions for setting up, operating, and maintaining your BE-4 mixer to ensure optimal performance.

The Audio Array BE-4 4-Channel Hybrid USB Audio Mixer, a compact and powerful device for audio production.
Setup
Follow these steps to set up your Audio Array BE-4 mixer:
- Power Connection: Connect the mixer to a power source using the provided USB Type-C cable. The mixer is USB-C powered, requiring low 10W power consumption.
- Computer/OTG Connection: For digital audio input/output and recording, connect the mixer to your computer via the USB-C port or to an OTG-compatible device.
- Microphone/Instrument Connection:
- Connect microphones to the XLR/TRS combo inputs (Channels 1-2). Ensure +48V phantom power is enabled for condenser microphones.
- Connect instruments (e.g., electric guitar) to the Hi-Z inputs for direct recording without external DI boxes.
- Line-level devices can be connected to the 3/4 stereo line inputs.
- Output Connection: Connect your studio monitors or PA system to the balanced XLR main outputs for clean signal transmission.
- Headphone Connection: Plug your headphones into the dedicated headphone output for monitoring.

This diagram illustrates various connectivity options for the BE-4 mixer, including microphones, instruments, active speakers, headphones, and computers.

The rear panel of the Audio Array BE-4 mixer, showing the OTG, PC, and Type-C power inputs for flexible connectivity.
Operating Instructions
Understanding the controls and features of your BE-4 mixer is crucial for effective operation:

A detailed view of the BE-4 mixer's controls, including gain, EQ, FX send, mute, volume faders, and master volume, illustrating its routing functionality.
- Gain Control: Adjust the input sensitivity for each channel to achieve optimal signal levels without clipping. The PEAK indicator will light up if the signal is too high.
- Phantom Power (+48V): Activate this switch for condenser microphones that require external power. Ensure dynamic microphones are not connected when phantom power is active.
- Hi-Z Input: Use this input for direct connection of high-impedance instruments like electric guitars.
- Equalization (EQ): The 3-band EQ (High, Mid, Low) allows you to shape the tone of each channel. Adjust these controls to enhance or cut specific frequencies.
- FX Send: Use the FX send knob to control the amount of signal sent from each channel to the built-in DSP effects processor.
- Built-in DSP Effects: The mixer includes 99 DSP effects. Use the dedicated controls and digital display to select and adjust effects like reverb, delay, and chorus.
- Pan Control: Position the sound of each channel within the stereo field (left to right).
- Mute Button: Mutes the audio output for the corresponding channel.
- Volume Faders (LEVEL): Adjust the individual volume levels for each channel.
- Master Volume (STEREO LEVEL): Controls the overall output volume of the main mix.
- Headphone Volume (MONITOR OUT): Adjusts the volume for the headphone output.
- USB Return: Controls the level of audio returning from a connected USB device.

The Audio Array BE-4 mixer features 99 built-in DSP effects, displayed on the digital screen for easy selection and adjustment.

A user operating the Audio Array BE-4 mixer during a recording session, demonstrating its practical application.
Maintenance
Proper maintenance ensures the longevity and optimal performance of your Audio Array BE-4 mixer:
- Cleaning: Use a soft, dry cloth to clean the exterior of the mixer. Avoid abrasive cleaners, solvents, or waxes. Do not spray liquids directly onto the unit.
- Storage: Store the mixer in a cool, dry place away from direct sunlight, extreme temperatures, and high humidity.
- Handling: Avoid dropping or subjecting the mixer to strong impacts. Do not place heavy objects on top of the unit.
- Ventilation: Ensure proper ventilation around the mixer to prevent overheating. Do not block any ventilation openings.
- Cable Management: Use proper cable management to prevent strain on connectors and accidental disconnections.
Troubleshooting
If you encounter issues with your BE-4 mixer, refer to the following common problems and solutions:
- No Sound Output:
- Check all cable connections (input, output, power).
- Ensure the master volume and individual channel faders are turned up.
- Verify that no channels are muted.
- Confirm that your speakers/headphones are powered on and connected correctly.
- Distorted Sound:
- Reduce the input gain for the affected channel to prevent clipping (PEAK indicator should not be constantly lit).
- Lower the master volume.
- Check if the connected audio source is sending a clean signal.
- Microphone Not Working (Condenser Mic):
- Ensure +48V phantom power is enabled for the channel the condenser microphone is connected to.
- Check the microphone cable for damage.
- No USB Audio/Recording:
- Verify the USB-C connection to your computer/OTG device.
- Check your computer's sound settings to ensure the BE-4 mixer is selected as the input/output device.
- Ensure your recording software is configured to use the BE-4 as its audio interface.
- Effects Not Heard:
- Increase the FX send knob on the desired channel.
- Adjust the FX knob for the overall effect level.
- Ensure an effect is selected on the digital display.
Specifications
| Feature | Detail |
|---|---|
| Brand | Audio Array |
| Model Number | BE-4 |
| Number of Channels | 4 |
| Product Dimensions | 14D x 16W x 4H Centimeters |
| Item Weight | 650 Grams |
| Connectivity Technology | USB |
| Frequency (Sample Rate) | 192 kHz |
| Output Connector Type | XLR |
| DSP Effects | 99 Built-in |
| Phantom Power | +48V |
| Power Consumption | 10W (USB Type-C powered) |
Warranty Information
The Audio Array BE-4 mixer comes with a 1 Year Manufacturer Warranty. Please retain your proof of purchase for any warranty claims. For detailed terms and conditions, refer to the warranty card included with your product or contact customer support.
Customer Support
For any support, feedback, or technical assistance regarding your Audio Array BE-4 mixer, please contact us using the information below:
- Manufacturer: Cambium Retail Private Limited
- Phone: +91 7996135111
- Email: support@audioarray.in
- Address: 109, Hubtown Solaris, Professor NS Phadke Rd, Andheri East, Mumbai, Maharashtra 400069, India

This illustration demonstrates the BE-4 mixer's compatibility with various devices such as smartphones, laptops, headphones, and professional power amplifiers.

The BE-4 mixer is suitable for various applications including independent compact studios, instrument recording, live concerts, and live events.