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 the backs of the units (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 condi-
tion 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.
Rack Mounting
Provided with each mixer are two rack ears, one long and one short, and six self-tapping screws
to attach the ears to the unit. When using more than one SmartMixer in a system, it may be
advantageous to mount two mixers in a 1U rack space. This can be accomplished using the two
short rack ears and an optional joining plate (Model AT8628), which allows two units to be con-
nected side-by-side in a single 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 pre-
vent unauthorized adjustments. To install, simply press the caps into place, covering the Gain and
Threshold controls. Place the provided sticker over the Master Level access opening in the panel.
The system should be tested carefully before installing the security caps because they are intend-
ed to be “permanent” and are very difficult to remove.
If removal of installed security caps becomes necessary, first remove the two screws on each
side of the unit and remove the top cover. Then remove the six screws that attach the front panel:
four on top and two underneath. Remove the front panel. With the panel removed, the two lock-
ing tabs on each security cap can be accessed. The cap can be released by carefully squeezing
the two tabs together.
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Summary of Contents for AT-MX341b SmartMixer
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