9
Owner
’s Manual
Owner’s Manual
ProFXv3 Front Panel Features
Connections and Channel Strip
Phantom Power
Most modern professional condenser mics require
48V phantom power, which lets the mixer 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.
The ProFXv3 mixer’s phantom power is
globally controlled by the phantom power
switch (meaning that phantom power for
all mic inputs is turned on and off together.)
Never plug single-ended (unbalanced)
micro phones or ribbon microphones into
the mic input jacks if phantom power is on.
Do not plug instrument outputs into the mic input jacks
with phantom power on unless you know for certain it
is safe to do so.
The vertical channel strips look very similar between
each model and have only a few differences between
them. Each channel works independently, and just
controls the signals plugged into the inputs directly
above them.
5. XLR and 1/4" Combo Inputs [Chs. 1 and 2]
Input channels 1 and 2 on all ProFXv3 models
may accept a balanced mic or line-level signal using
an XLR connector. They are wired as follows, according
to standards specified by the AES (Audio Engineering
Society).
XLR Balanced Wiring:
Pin 1 = Shield (ground)
Pin 2 = Positive (+ or hot)
Pin 3 = Negative (– or cold)
Both channels may also accept 1/4" line-level
signals driven by balanced or unbalanced sources.
Additionally, both channels may accept Hi-Z sources
(such as guitars) via the 1/4" input without the need
for a separate DI box. Don't forget to engage the Hi-Z
switch, though!
2
3
1
SHIELD
COLD
HOT
SHIELD
COLD
HOT
3
2
1
ONYX MIC PRE
MIC
ONYX MIC PRE
MIC
ONYX MIC PRE
MIC
LINE IN
BAL/
UNBAL
LINE IN
BAL/
UNBAL
LEVEL
SET
GAIN
USB 3-4
U
+60
MIC
GAIN
MUTE
MUTE
MUTE
MUTE
MUTE
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6
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