Audio-Technica AT-MX351 manual Daisy-chaining Mixers, Rack Mounting, Security Caps

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Daisy-chaining Mixers

When more than four microphones are needed, it is possible to daisy-chain multiple SmartMixers together through the Link In/Out connectors on their back panels (Fig. 2). Connect Mixer #1 Link Out jack to Mixer #2 Link In jack, etc. Mixer #1 output contains only audio from the first four microphones; Mixer #2 output then contains audio from all the microphones plugged into Mixer #1 and the microphones plugged into Mixer #2. The last mixer in the chain contains audio from all preceding mixers. The combined output is then taken from the last mixer in the chain. Because lockout information is passed between mixers through Link In/Out, the last-microphone-on condition is not violated. Thus only one microphone per installation will stay on when no one is speaking.

Note that one or more mixers can be switched to “Manual” mode without affecting the automatic operation of any other mixers in the chain.

NOMA information is passed between AT-MX351 mixers through Link In/Out. If AT-MX351 mixers are linked with AT-MX341 and/or AT-MX341a mixers, the NOMA function will pass through the AT-MX341(a) models but their mics will not be included in the NOMA calculation.

Rack Mounting

Provided with each mixer are two rack ears and six self-tapping screws to attach the ears to the unit, which allow the unit to be mounted in a 1U rack space.

Security Caps

For permanent installations where microphone selections, positions and acoustic conditions are constant, it may be advantageous to remove the front panel knobs and install security caps to prevent unauthorized adjustments. To install, simply press the caps into place, covering the desired control(s). The system should be tested carefully before installing the security caps because they are intended to be “permanent” and are very difficult to remove.

If removal of installed security caps becomes necessary, unplug the mixer, remove the two screws on each side of the unit and remove the top cover. Then remove the nine screws that attach the front panel: six on top and three underneath. Remove the front panel. With the panel removed, the two locking tabs on each security cap can be accessed. The cap can be released by carefully squeezing the two tabs together.

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Contents AT-MX351 SmartMixer  Page Contents Safety Cautions Introduction What is a SmartMixer?Features Power switch Power on indicator AT-MX351 Front PanelAT-MX351 Rear Panel Unbalanced line-level -10 dBV output. RCA jackInstallation and Setup Priority Microphones and the Lockout Bus ChannelsAuxiliary Input Preamplifier GainOutput Level LED Meter Phantom PowerOutput Level Internal view of mixer Input Limiters Adjusting Off AttenuationPreamp Outputs Force-on/Force-offControl Voltage Out Control interface examplesSecurity Caps Daisy-chaining MixersRack Mounting Specifications† One-Year Limited Warranty
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AT-MX351 specifications

The Audio-Technica AT-MX351 is a versatile mixer that has gained a strong reputation amongst audio professionals for its performance and utility. Designed for various applications, from live sound to permanent installation, the AT-MX351 boasts features that enhance audio quality and ease of use.

One of the standout features of the AT-MX351 is its ability to handle multiple audio sources with ease. It features three programmable microphone inputs, making it perfect for settings where multiple speakers or performers are involved. This is especially useful in conference rooms, lecture halls, and places of worship, where different users may need to take turns speaking without the hassle of connecting and disconnecting microphones.

The mixer is equipped with advanced automatic mixing technology, which intelligently manages the audio levels from various microphones. This prevents feedback and minimizes background noise, resulting in clear and intelligible sound. The AT-MX351 utilizes Audio-Technica's proprietary Automatic Gain Controls (AGC) to ensure that the audio levels remain consistent, providing a professional sound experience.

In terms of connectivity, the AT-MX351 features balanced XLR inputs, allowing for secure connections that maintain audio integrity. It also includes unbalanced line inputs, catering to a wider array of equipment. The mixer offers both balanced and unbalanced outputs, providing flexibility for integration into different sound systems.

Another notable characteristic of the AT-MX351 is its user-friendly interface. The layout of the controls is intuitive, allowing operators to make quick adjustments on the fly. The clear LED indicators help users monitor signal levels easily, making it easier to identify any issues. This is particularly beneficial during live events where quick decision-making is crucial.

The AT-MX351 also incorporates a built-in limiter and compressor, which help to avoid distortion and maintain a consistent sound quality. This feature is especially important in environments with varying acoustic dynamics or when dealing with powerful audio signals.

In summary, the Audio-Technica AT-MX351 mixer stands out due to its robust features, including multiple programmable microphone inputs, advanced automatic mixing technology, and user-friendly controls. This combination of technology and usability makes it an ideal choice for audio professionals seeking reliability and high-quality sound in their applications. Whether for live performances, conferences, or installations, the AT-MX351 proves to be a reliable and effective solution in the audio mixing landscape.