Mackie ProFX16v2 Owner's Manual

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oFX30v2
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ProFX8v2 • ProFX12v2 • ProFX16v2 • ProFX22v2 • ProFX30v2
Stereo Graphic EQ, Main Meters and more!
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39. Stereo Graphic EQ
This 7-band graphic equalizer adjusts the main  
mix output. It affects the line-level outputs, but  
not the headphones, tape outputs, or the USB output.  
In the ProFX16v2, ProFX22v2 and ProFX30v2, the  
control room and phones are post-EQ and post-main 
fader. In the ProFX8v2 and ProFX12v2, the phones  
are pre-EQ and pre-main fader.
This EQ may be used for a monitor mix instead of  
the main mix if the main mix/mon 1 switch is engaged. 
It may also be quickly bypassed using the EQ in/bypass 
switch.
Each slider allows you to adjust the level of its  
frequency band, with up to 15 dB of boost or cut,  
and no change in level at the center (0 dB) position. 
The frequency bands are: 125 Hz, 250 Hz, 500 Hz,  
1 kHz, 2 kHz, 4 kHz and 8 kHz.
The EQ section comes before the main mix fader  
and meters. As with the channel EQ, just take it easy. 
There is a large amount of adjustment, and if you  
are not careful, you can upset the delicate balance  
of nature. Although it may not seem cool to actually  
turn down controls, with EQ it is often the best option. 
Turn down the offending frequency range rather than  
boosting the desired range. You may use it to reduce the 
level of some frequency bands where feedback occurs.
40. Main Mix / Mon 1 Switch
This switch allows you to choose if the stereo  
graphic EQ is used for the stereo left and right main  
mix or if it is used for monitors. For example, there  
may be times when the graphic EQ may be used wisely 
in the monitor mix to reduce feedback in the monitors 
from nearby microphones. This only affects the monitor 
1 output.
41. EQ In / Bypass Switch
This switch allows you to quickly engage or  
disengage the stereo graphic EQ. This may be used  
for quick checks of your EQ settings, or to shorten  
the signal path if you do not need to use the EQ.
37. 48V Phantom Power Switch
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.
Press this switch in if your microphone requires  
phantom power. (Always check the position of  
this switch before connecting microphones.)  
The accompanying LED will illuminate red to indicate 
that phantom power is active. This is a global switch 
that affects all mic channels' XLR jacks at once.
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 know  
for certain it is safe to do so. Be sure the main mix  
fader is turned down when connecting microphones  
to the mic inputs when phantom power is turned on,  
to prevent pops from getting through to the speakers.
38. Power LED
This LED will illuminate green when the mixer is 
turned on, as a reminder of how on it really is. If it is 
not on, then it is off, and the mixer becomes a rather 
nice weight for keeping your morning newspaper from  
blowing away in the wind.
If it does not turn on, make sure the power cord is 
correctly inserted at both ends, the local AC mains   
supply is active, and the power switch is on.