MACKIE 400F - Manual (Page 30)

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ONYX 400F
ONYX 400F
• When connecting an unbalanced output to a bal-
anced input, be sure that the signal high (hot)
connections are wired to each other. The unbal-
anced ground (earth) connection should be wired
to the low (cold) and the ground (earth) connec-
tions of the balanced input. If there are ground-loop
problems, try disconnecting the unbalanced ground
(earth) connection from the balanced input ground
(earth) connection, leaving the unbalanced ground
connected to the balanced input low (cold) con-
nection only.
In some cases, you may have to make up special
adapters to interconnect your equipment. For example,
you may need a balanced XLR female connected to an
unbalanced 1/4" TS phone plug. Many common adapters
can be found at your local electronics supply store.
TRS Send/Receive Insert Jacks
Mackie’s single-jack inserts are three-conductor 1/4"
TRS phone jacks. They are unbalanced, but have both
the preamp output (send) and input (return) signals in
one connector.
The sleeve is the common ground (earth) for both
signals. The send from the preamp to the external unit
is carried on the tip, and the return from the unit to the
preamp is on the ring.
“from ti
this plug connects to one of the
mixer’s Channel Insert jacks.
“to ring”
tip
ring
sleeve
SEND to processor
RETURN from processor
(TRS plug)
Using the Send Only on an Insert Jack
If you insert a 1/4" TS (mono) plug only partially (to
the fi rst click) into a Mackie insert jack, the plug will
not activate the jack switch and will not open the insert
loop in the circuit (thereby allowing the channel signal
to continue on its merry way through the preamp).
This allows you to tap out the channel’s signal at that
point in the circuit without interrupting normal operation.
Note: Do not overload or short-circuit
the signal you are tapping from the
preamp. That will affect the internal
signal.
If you push the 1/4" TS plug in to the second click,
you will open the jack switch and create a direct out,
which does interrupt the signal in that channel.
Direct out with no signal interruption to master.
Insert only to first “click.”
Channel Insert jack
Channel Insert jack
Channel Insert jack
Direct out with signal interruption to master.
Insert all the way in to the second “click.”
For use as an effects loop.
(TIP = SEND to effect, RING = RETURN from effect)
MONO PLUG
MONO PLUG
STEREO
PLUG
Mults and “Y”s
A mult or “Y” connector allows you to route one output
to two or more inputs by simply providing parallel wir-
ing connections. You can make “Y”s and mults for the
outputs of both unbalanced and balanced circuits.
Remember: Only mult or “Y” an
output into several inputs. If you need
to combine several outputs into one
input, you must use a mixer, not a
mult or a “Y.”
Y-Cord Splitter