Rear Panel; Mic/Line Inputs; Inserts - Mackie Onyx 400F Owner's Manual

Rear Panel

The rear panel is where you make all your analog and
digital audio connections to the Onyx 400F (except for
the headphones and the high-impedance instrument
jacks on the front).

13. MIC/Line Inputs

These are Neutrik combo connectors, which accept
balanced microphone inputs from an XLR connector or
balanced line-level inputs from a 1/4" TRS connector.
The microphone preamps feature our new Onyx design,
with higher fi delity and headroom rivaling any stand-
alone mic preamp on the market today.
The XLR inputs are wired as follows:
Pin 1 = Shield or ground
Pin 2 = Positive (+ or hot)
Pin 3 = Negative (– or cold)
The 1/4" inputs are wired as follows:
Sleeve = Shield or ground
Tip = Positive (+ or hot)
Ring = Negative (– or cold)

14. INSERTS

These 1/4" TRS jacks provide a send and return point
for channels 1-4. Use the CHANNEL INSERT jacks to
connect serial effects devices such as compressors,
equalizers, de-essers, or fi lters to each individual channel.
The INSERT points are after the GAIN controls, and
just before the analog-to-digital converters. The send
(tip) is low-impedance, capable of driving any device.
The return (ring) is high-impedance and can be driven
by almost any device.
Tip: Since the inserts are before the
A/D converters, it's a good place to
strap a compressor on an unruly sing-
er to avoid overloading the A/D con-
verter without having to turn down
the GAIN control a whole bunch.
MIC/LINE MIC/LINE
4
14
ONYX 400F
MIC/LINE MIC/LINE
3
3 2 1
4
Special insert cables are available, specially designed
for this kind of insert jack. They are wired as follows:
ring
(TRS plug)
tip sleeve
this plug connects to one of the
mixer's Channel Insert jacks.
Tip = Send (output to effects device)
Ring = Return ( input from effects device)
Sleeve = Common ground (connect shield to all
three sleeves)
Besides being used for inserting external devices,
these jacks can also be used as channel direct outputs
(post-GAIN). This is an unbalanced direct out.
Here are three ways you 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 effect)
INSERTS LINE IN
7
1 7 5
8
2 8 6
SEND to processor
"from ti
"to ring"
RETURN from processor
Channel Insert jack
Channel Insert jack
Channel Insert jack
LINE OUT CR
5 3 1 L
6 4 2 R