Audio-Technica AT-MX351 - Manuals

Page 2 - Contents; Introduction; Back cover

Contents Introduction ....................................................................................................................... 5 What is a SmartMixer  ? ........................................................................................................... 5 Features ...............

Page 3 - Safety Cautions; Référez tout réparation au personnel qualifié.; Warning: This apparatus must be grounded.; a bien été réétablie.; Note: Line Voltage Selector Switch; Do not expose this apparatus to drips or splashes.

Safety Cautions Prior to use of this product, review all safety markings and instructions. To prevent electric shock, do not remove the cover. There are no user-serviceable parts inside. Internal adjustments are for qualified professionals only. Refer all servicing to qualified ser- vice personnel.P...

Page 4 - What is a SmartMixer?; The AT-MX351 SmartMixer; Features; NOMA (Number of Open Microphones Attenuated)

Introduction Please Note!This manual assumes use of microphone-level inputs and line-level output, the most typical SmartMixer application. However, all inputs and the output may be individually switched internally to achieve any combination of mic- and line-level input/output. See page 10 for detai...

Page 6 - External Control connector.; For TTL output, plus closure-control input for external

AT-MX351 Rear Panel 1. External Control connector. For TTL output, plus closure-control input for external control of each channel. 2. Link In/Link Out. Provides for daisy-chaining of multiple mixers when more than four microphones are used. 3. Line/Mic balanced output. Level can be changed via inte...

Page 7 - Installation and Setup; any

Installation and Setup AT-MX351 SmartMixer setup tips: 1. Turn the Master level control to the minimum position. Proceed with steps 2-9. 2. Set all Priority DIP switches and Manual mode switch to “down” position. 3. Turn all four microphone Gain controls fully counterclockwise. 4. Connect the power ...

Page 8 - NOMA; each individual; Auxiliary Input

Mode 2 …Priority Pre-select switches (1-4) Down In this mode, only one mic at a time can be “on.” The lockout bus shuts down all other mics until the first speaker pauses. As soon as the controlling microphone goes silent, the lockout bus goes inactive and any other mic can come on. This switching t...

Page 9 - Summary of Internal Controls; Figure 3. Summary of internal controls

The preamplifier gain may be reduced further, allowing the SmartMixer to accept line-level sources. Changing the settings of the internal switches designated by “SW3,” “SW9,” “SW15” and “SW21” will cause an input reduction of 50 dB for channels 1, 2, 3 and 4 respectively. Note that the appropriate i...

Page 11 - External Control Connector Pinout

Adjusting ”Off” Attenuation In instances when the number of microphones in use is high, it may be necessary to increase the amount of “off ” attenuation per microphone to keep the total ambient noise level low. There are “off ” attenuation adjustments inside the unit. To adjust the “off ” attenuatio...

Page 12 - The control voltage should not be connected directly to an

CV G R Driving One LED I ≈ 2v R+40 Ω Driving Lamps 2 N 3904 + CV 10 K Ω G G CV Driving Logic Gates Equivalent OutputCircuit for ControlVoltage Out CONTROL VOLTAGE 40 Ω GND Relay Driver 2N3904 IN4001 + CV 10K Ω RELAY COIL G Control Voltage Out When a microphone channel turns “on,” as indicated by a S...

Page 13 - Daisy-chaining Mixers; and; Rack Mounting

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 f...

Page 14 - Specifications

Specifications † Input Impedance Mic . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8,000 ohms Line . . . . . . . . . . . . . . . . . . . . . . . . . . . 50,000 ohms Aux . . . . . . . . . . . . . . . . . . . . . . . . . . . 50,000 ohms Link In . . . . . . . . . . . . . . . . . . . . . . . ....

Page 15 - One-Year Limited Warranty

One-Year Limited Warranty Audio -Technica brand products purchased in the U.S.A. are warranted for one year from date of purchase by Audio-Technica U.S., Inc. (A.T.U.S.) to be free of defects in materials and workmanship. In event of such defect, product will be repaired promptly without charge or, ...