AUDIO TECHNICA AT MX351 PDF

Turn the Master level control to the minimum position. Proceed with steps Turn all four microphone Gain controls fully counterclockwise. Connect the power cord to the mixer and plug into AC outlet. Be certain the voltage switch on bottom of unit is set for the voltage of the outlet you are using. The channel 1 LED will light if the microphone is operational.

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Turn the Master level control to the minimum position. Proceed with steps Turn all four microphone Gain controls fully counterclockwise. Connect the power cord to the mixer and plug into AC outlet. Be certain the voltage switch on bottom of unit is set for the voltage of the outlet you are using.

The channel 1 LED will light if the microphone is operational. Adjust the Gain 1 control for proper meter indication when speaking into microphone peaks at 0. Plug in up to three other microphones and adjust each respective Gain control for proper meter indication. Any microphone s assigned in this manner cannot be locked out by any other microphone. In this mode, the unit will behave like a conventional mixer all automatic functions are bypassed except for limiting and NOMA if selected.

Adjust the Master level control for desired output level. This control is at the last stage in the mixer, and does not affect microphone gain, threshold setting, meter indication, monitor or preamp outputs. Priority Microphones and the Lockout Bus Channels Once the Gain controls have been properly adjusted, an audio signal appearing in any channel causes the lockout control bus to activate and the Lockout LED indicator to light.

Priority Pre-select switches Up The Lockout indicator will come on with any audio input, but no mic will be locked out…because none are connected to the lockout bus. As soon as the controlling microphone goes silent, the lockout bus goes inactive and any other mic can come on. This switching takes place without any syllable-grabbing delay, or pops or clicks. The SmartMixer will not allow multiple microphones to be on at the same time in this mode.

The switching is so fast and silent that the meeting can still be completely interactive. Note that there may be special circumstances where two or three mics could be set to priority, so those speakers could talk whenever desired, but still override one or two non-priority mics.

NOMA serves to maintain overall system gain by proportionately reducing amplifier gain as the number of open microphones increases. In a sound reinforcement system, this can tend to preserve the feedback margin and system stability. However, this action necessarily reduces the sound level of each individual person speaking, which may not be desired. Generally speaking, use of NOMA is not desirable in applications such as teleconferencing, recording or broadcasting.

There is no signal processing of the Aux input. Preamplifier Gain The SmartMixer has a substantial gain range, allowing it to accept a wide variety of microphones. However, if in some instances higher-output microphones are used for close talking, it may be necessary to reduce the preamplifier gain.

This can be done by changing switch settings inside the unit. With the unit unplugged from its AC source, remove the two screws on each side of the unit and carefully lift off the top cover. Changing the settings of these internal switches will cause a gain reduction of 10 dB for channels 1, 2, 3 and 4 respectively. Note that the appropriate internal switches can be used in combination for a total sensitivity reduction of up to 60 dB for each channel.

Changing the setting of this switch will cause a 50 dB reduction in output. Changing the settings of these switches will disable phantom power on channels 1, 2, 3 and 4, respectively. Summary of Internal Controls.

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Audio-Technica AT-MX351 Automatic Mixer

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Audio-Technica AT-MX351 Automatic Micer

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