Mackie Onyx 400F Owner's Manual page 30

• 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.
ring
(TRS plug)
tip sleeve
this plug connects to one of the
mixer's Channel Insert jacks.
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).
30
ONYX 400F
point in the circuit without interrupting normal operation.
you will open the jack switch and create a direct out,
which does interrupt the signal in that channel.
SEND to processor
"from ti
Mults and "Y"s
"to ring"
RETURN from processor
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.
Y-Cord Splitter
This allows you to tap out the channel's signal at that
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,
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 effect)
A mult or "Y" connector allows you to route one output
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."
Channel Insert jack
Channel Insert jack
Channel Insert jack