Features; Rear Panel; Mic/Line Inputs; 4" L/R Monitor Out - Mackie Onyx Blackjack Owner's Manual

Onyx Blackjack Features

Rear Panel

1. MIC/LINE/HI-Z INPUTS
These dual Onyx mic preamps accept both balanced
microphone inputs from an XLR connector and
balanced and unbalanced line-level inputs from a 1/4"
TRS connector. The microphone preamps feature our
Onyx design, with higher fidelity and headroom rivaling
any standalone 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" jacks share circuitry (but not phantom
power) with the mic preamps, and can be driven by
balanced or unbalanced sources.
To connect balanced lines to these inputs, use a 1⁄4"
Tip-Ring-Sleeve (TRS) plug, wired as follows:
Tip = Positive (+ or hot)
Ring = Negative (– or cold)
Sleeve = Shield or ground
To connect unbalanced lines to these inputs, use a
1⁄4" mono (TS) phone plug, wired as follows:
Tip = Positive (+ or hot)
Sleeve = Shield or ground
This line-level input can also accept instrument-level
signals if the hi-z switch [6] is pressed in. This allows
you to connect guitars directly into either channel
without the need for a DI box.
8 Onyx Blackjack
MONITOR OUT
USB R
BAL /UNBAL BAL/UNBAL
3 2
2
L
1
PHANTOM POWER
Most modern professional condenser mics require
48V phantom power, which lets the interface send
low-current DC voltage to the mic's electronics
through the same wires that carry audio. (Semi-pro
condenser mics often have batteries to accomplish the
same thing.) "Phantom" owes its name to an ability to
be "unseen" by dynamic mics (Shure SM57/SM58, for
instance), which don't need external power and aren't
affected by it anyway.
Phantom power may be selected by depressing the
interface's phantom power switch [12].
Never plug single-ended (unbalanced)
micro phones, or ribbon mics into the mic
input jacks if phantom power is on. Do not
plug instrument outputs into the mic XLR input jacks
with phantom power on, unless you are certain it is safe
to do so.

2. 1/4" L/R MONITOR OUT

These 1/4" connectors provide a balanced or
unbalanced line-level signal that is designed to be used
to provide a monitor mix to a pair of powered studio
monitors, or amplifier powering passive studio monitors.
1