MACKIE 400F - Manual (Page 14)

14
ONYX 400F
ONYX 400F
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.
Special insert cables are available, specially designed
for this kind of insert jack. They are wired as follows:
“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)
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:
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
1
LINE OUT LINE IN INSERTS CR
MIC/LINE
R
L
2
1
4
3
6
5
8
7
6
5
8
7
2
1
4
3
ON YX MIC PRE
2
MIC/LINE
ON YX MIC PRE
3
MIC/LINE
ON YX MIC PRE
4
MIC/LINE
ON YX MIC PRE