Instruction/ maintenance manual of the product AT-MX351 Audio-Technica
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A T- MX 35 1 S m ar tMi x er Automatic Mixer Installation and Operation.
Contents Introduction ....................................................................................................................... 5 What is a SmartMixer ? ................................................................................
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.
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.
A T-MX35 1 Front Panel 1. Power switch. 2. Power “on” indicator. 3. Input Gain controls. Adjust inputs for microphone sensitivities and/or operating conditions. 4. Selected Channel LED indicators. Indicate which channels are “on” or “active.
AT-MX35 1 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.
Installation and Setup AT-MX35 1 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.
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.
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 reductio n of 50 dB for channel s 1, 2, 3 and 4 respectively.
Figure 4. Internal view of mixer. Figure 5. Detail of internal controls. S W 2 7 S W 2 5 S W 2 6 Front Panel Rear Panel 11 Mi c SW3 –40 dB SW5 –20 dB VR3 Min. –6 dB –40 dB SW1 1 –20 dB VR6 Min. –6 dB –40 dB SW17 –20 dB VR9 Min. –6 dB –40 dB SW23 –20 dB VR12 Min.
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.
CV G R D r i v i n g O n e L E D I ≈ 2v R+ 4 0 Ω D r i v i n g L a m p s 2 N 3904 + CV 1 0 K Ω G G CV D r i v i n g L o g i c G a t e s E q u i v a l e n t O u t p u t C i r c u i t f o r C o n .
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.
Specifications † Input Impedance Mic ............................ 8,000 ohms Line ........................... 50,000 ohms Aux ........................... 50,000 ohms Link In ........................ 20,000 ohms Output Impedance Balanced Line .......
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.
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If you already are a holder of Audio-Technica AT-MX351, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Audio-Technica AT-MX351.
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