Art Project Series User Manual page 10

You get from 0 to 50dB (Bal Inputs) of gain depending on set-
tings. Set the controls counterclockwise to minimum gain when
connecting the inputs.
The Output Gain control allows you to directly adjust the CH1/2
rear jacks.
The Input Monitor switch when engaged, feeds the audio to the
Headphone CH3/4 jack. The Input Monitor function sums all of
the input channels into mono and sends this audio to the Head-
phone out. When this function is used minimize the unused
channels, this will reduce the noise in the output. The headphone
gain can be adjusted from the Headphone Level (3/4CH) pot.
You can use the headphone output as an unbalanced line level
signal source when not using it for monitoring with headphones.
The Phantom power switch on the front, applies +48 Volt phan-
tom power to the XLR input jacks for powering microphones, if
needed. It is slow at turning on and off and is current limited to
protect sensitive microphones and reduce audible pops. Ideally,
when connecting a microphone that requires phantom power,
you should first turn down gain. Next connect the microphone,
switch on the phantom power and bring the gain back up to the
desired level. This minimizes pops in your system and stress on
the microphone.
The USB bus will power the USB Pre IV interface. When used in
a portable or remote recording situation the USB Pre IV, a laptop
computer, a pair of microphones, and a set of headphones, be-
come your entire system.
The Level Indicators are shown through LED light rings around
the channel gain pots. When monitoring the Signal Level dual
function LED ring metering circuitry around the gain pots on each
channel aids in setting gain and has a fast attack to help indicate
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