API Audio 1608 Recording Console - Manual (Page 21)

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3.1 Echo Send Section
The Echo Send section has the following features:
 Flexible input sources (including a combined external input)
 On/off switch
 Level control
 Solo (AFL only)
 Talkback insertion for cue/foldback sends (headphone sends)
 Routing to the Echo Return section
 Balanced, line-level output at the ECHO SENDS OUTPUT 1-8 sub-D connector
The Echo Send section can be fed from two simultaneous sources:
 Auxiliary Bus: The output of its corresponding Echo Sum Bus
and/or
 External Input: ECHO SEND EXTERNAL INPUT 1/4” tip-ring-sleeve jack
Echo Send Master: The Echo Send Master is the master control level for its corresponding Echo
Send Bus.
External Audio Input: In addition to the normal feed from its corresponding Echo Sum Bus, the
Echo Send can accept a balanced, line-level input from the corresponding ECHO SEND
EXTERNAL INPUT 1/4” tip-ring-sleeve jack on the rear panel. This signal is added to the output
from the corresponding Echo Sum Bus when the EXT IN button is engaged.
IMPORTANT NOTE: When the EXT IN button is engaged, the external input is combined with the
output from the corresponding Echo Sum Bus and is fed to the input of the Echo Send section.
Regardless of the input source, the balanced, line-level output of the Echo Send is fed to the
ECHO SENDS OUTPUT 1-8 sub-D connector on the rear panel for connection to effects devices,
cue/foldback systems, and so on. This output is active whenever the corresponding Echo Send
is turned on.
The output of the Echo Send can be selected as the input to its corresponding Echo Return
section for additional routing to the Program or Summing Buses. This is done by engaging the
MIX button in the Echo Return section. This can be very useful for creating sub-groups, mix
minus cue feeds, and other applications.
The output of the Echo Send is also fed to its corresponding meter in the Meter Bridge (E1-E8).
The output of the Echo Return section can be sent to the meter instead by engaging the VU RET
button.
The E1608 ECHO SEND section primarily functions as an echo send
master. It can also provide grouping functions when used with the
echo sends, external inputs, and the Echo Return section.
It is possible to combine an external audio input with the Echo Bus
at the input of the Echo Send section.