Insert; Effects: Serial Or Parallel; Stereo Line In - Mackie SR24.4-VLZ PRO Owner's Manual

3. INSERT

With nothing plugged into this jack, the
channel's signal goes straight through the mic/
line preamp to the channel strip. With an ex-
ternal effects device plugged into this jack, the
channel's signal leaves the mixer, goes through
the effects device and back into the channel
strip.
Use these jacks to send the channel signal
through a compressor, graphic equalizer or
similar device. Since the insert is before the
CHANNEL FADER (42), moving that fader will
not alter the level sent to a compressor,
thereby preserving the original signal's charac-
teristics.
These unbalanced jacks are wired thusly:
Tip = Send (to effects device input)
Ring = Return (from effects device output)
Sleeve = Common ground (connect shield
to all three sleeves)
ring
(TRS plug)
tip sleeve
This plug connects to one of the
mixer's Channel Insert jacks.
Specialty "Y" cables, developed just for these
jacks, are widely available.
Besides being used for inserting effects de-
vices, these jacks can also be used as channel
direct outputs; post-TRIM, pre-LOW CUT and
pre EQ.
Here are three ways to use the INSERT
jacks:
MONO PLUG
Direct out with no signal interruption to master.
Insert only to first "click"
MONO PLUG
Direct out with signal interruption to master.
Insert all the way in to the second "click"
STEREO
PLUG
For use as an effects loop.
(TIP = SEND to effect, RING = RETURN from effects)

EFFECTS: SERIAL OR PARALLEL?

sor/limiters, graphic equalizers. Connections
are typically made via the channel insert jacks.
is tapped off to the effects device processed
and returned, to be mixed with the original
"dry" signals. Multiple signals (via multiple
mixer channels) can all make use of the same
parallel effects device. Examples include:
reverb, delay, chorus. Connections are typically
made via aux sends & aux returns.
Serial Device
SEND to processor
"tip"
Parallel Device
"ring"
RETURN from processor
Dry Signal(s)

4. STEREO LINE IN

balanced or TS unbalanced signals, from -20dB
to +20dB. They can accept any line-level in-
strument, effects device or tape player.
Channel Insert jack
cords), use the LEFT (MONO) input and the
RIGHT input.
cord), always use the LEFT (MONO) input and
plug nothing into the RIGHT input. A trick
Channel Insert jack
called "jack normalling" will cause the signal to
appear on both sides.
1/4" TS unbalanced plugs, see the previous
page for wiring details.
Channel Insert jack
Effects devices are used
either in serial or in parallel:
Serial means that the en-
tire signal is routed through
the effects device. Examples
include: preamps, compres-
Parallel means that a portion of the signal
Insert
Send
Signal Processor
(e.g., Compressor)
Dry Signal
Aux
Send
Signal Processor
(e.g., Reverb)
Channel Path
These balanced inputs are designed for TRS
When connecting a stereo device (two
When connecting a mono device (just one
These inputs accept 1/4" TRS balanced and
Insert
Return
Processed
Aux Output
Return Section
Wet Signal
Mix Processed
Stage
Dry Signal(s)
15
Signal
Signal