Main Inserts; Aux Sends - Mackie SR24•4 Owner's Manual

MAIN INSERTS L & R
Just below the MAIN OUTS jacks [11] at
the left of the rear panel are the MAIN
INSERT L and R jacks [12]. Like the channel
and submix inserts, these patch points allow
you to insert a processing device, such as a
compressor or an equalizer, into the main left
and right mix buses. Any processing you do at
this point will affect your entire mix. The in-
sert point is after the bus mixing amplifiers
but before the master fader.
The MAIN INSERT jacks are wired in the
same way as the other insert jacks on the
SR24•4. The inserts are made through a
(tip-ring-sleeve) phone jack, and offer both an
unbalanced main send or output and an unbal-
anced main return on the same jack. The
nominal insert send and return level is 0dBu,
and the insert return clipping point is +22dBu.
The sleeve of the jack is connected to
ground for both insert send and return sig-
nals. The tip is the insert send signal, and the
ring is the insert return signal.
NOTE: These inserts can
be used as pre-fader
direct outputs, using an
unbalanced
phone plug in one of
these two ways:
MAIN OUTS

AUX SENDS

L 1
R 2
3
L
R
R

MAIN INSERTS

CONTROL ROOM OUT
Insert the plug just to the FIRST click.
Do not push the plug all the way in. This
connection allows you to tap a direct out
without interrupting the channel strip
signal; or
Insert the plug all the way in to the
SECOND click. This also provides a direct
out connection, but the channel strip signal
is interrupted at that point. See Figure D on
page 30.
AUX SENDS
Here is where many boards fall short when
it comes to sound reinforcement purposes.
1 / " TRS
4
The SR24•4 offers SIX (6) independent auxil-
iary sends. The outputs of each are capable of
driving a balanced line. This means that you
no longer have to use balancing transform-
ers to get your monitor sends to the stage.
Just plug in a balanced TRS plug into one of
the Aux outputs and run a line to the monitor
graphic EQ. Voila!
The six auxiliary send buses of the SR24•4
appear at the six numbered
jacks, located near the rear panel's left
side[13].
The AUX SEND connections are imped-
1 / " (TS)
4
ance balanced
jacks, with sleeve connected to ground, tip to
signal "hot" (or "high" or "+"), and to ring to
signal "cold" (or "low" or "–"). These jacks are
also wired to accommodate unbalanced
STEREO AUX RETURNS
4
R
1
5
R
2
R
6
3
L R
4
(MONO)
" AUX SEND
1 /
4
1 / " TRS (tip-ring-sleeve) phone
4
SUB OUTS
L
1
5
L
2
6
L 3
7
L 4
8
and Function
/ " TS
1
4
SUB INSERTS
1
2
3
4
31
Layout