Speck XTRAMIXcxi, Reference Manual

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Each Bus/Subgroup channel provides a 1/4" T.R.S. (tip, ring, sleeve)
insert jack. The Insert Jack provides line level interstage access to the
assign subgroup bus before (pre) the Subgroup Master Level Control.
This means that any device interfaced to this jack will be processed
before its respective Subgroup Master Control, and will not be affected
by any adjustments of the Subgroup Master Control.
The Insert Jack may be utilized to connect limiters, equalizers, noise
reduction, or automation.
The ring of the 1/4" jack is the unbalanced insert send (pre the assign
Subgroup Master Control), the tip is the unbalanced insert return, and
the sleeve is the signal ground. Any stereo 1/4" plug interfaced to this
jack should be wired accordingly. (See figure 9b)
Each monitor channel provides a stereo balanced 1/4” TRS input for the
return of any stereo line level signal, such as a analog, digital, or hard
disk recorder. A discrete mono signal may be utilized when plugged
into the left connector only. These 1/4" input connectors may be selected
with the Bus/Line Switch on its respective monitor channel.
This switch selects the subgroup source for its respective monitor
channel. In the Pre position, the source for the monitor channel is before
(Pre) the assign Subgroup Master Control. When set to this position any
adjustment to the Subgroup Master Control will have no direct affect on
the monitor channel volume. In the Post position, the source for the
monitor channel is after (Post) its respective Subgroup Master Control.
This permits the monitor channel to follow any adjustment made to its
respective Subgroup Master.
11. Assign Subgroup
Insert Jack
37
Monitor Section
Connections and
Switches
12. Monitor Line Return Jacks
13. Monitor Pre/Post Select
Switch
Fig 9a "Y" Cable
Fig 9b "Y" Cable schematic
Chapter 4 Operation Section