PreSonus AudioBox Stereo - Manual (Page 7)

5
AudioBox™ Stereo User Guide
2 Hookup
2.1 Front-Panel Connections
Microphone / Instrument
Inputs. Each input channel
has both a microphone and
an instrument preamplifier.
The combo connectors allow
you to use either a ¼” TS
or the included XLR cables.
Use the ¼” connection for
guitars and other unamplified
instruments. Use the XLR
connections to connect
your PS626 microphones.
48V Phantom Power. This
button activates phantom power
for both microphone preamps.
Power User Tip: Condenser
microphones, like the PS626
microphones included in your
AudioBox Stereo bundle require
+48V phantom power to operate.
When using microphones other
than those included in this
bundle, review the manufacturer’s
documentation to verify that
phantom power is required and
will not damage the microphone.
Power LED. This LED indicates
bus power. It will illuminate
red when the AudioBox USB
is being properly powered
by the USB connection
on your computer.
Main Level. This knob
controls the output level
for the Main Outs on
the back of the unit.
Mixer. The knob blends the
analog input signals with
the playback signal from
your computer. This allows
you to monitor your input
signal with zero latency. If
the knob is positioned at 12
o’clock, the input signal and
the playback stream will be
equally balanced. Turning the
knob to the left will increase
the level of the input signal
relative to the playback stream;
turning it right will increase the
level of the playback stream
relative to the input signal.
Power User Tip: In most instances
you will set the Mixer knob to
Input while you are recording and
Playback when you are listening
to your recordings in Studio One.
Phones Level. This knob
controls the output level for
the headphone connection
on the back of the unit.
Input Gain/Trim Control.
These knobs adjust the
input gain level for their
respective inputs.
Clip Indicator. Both channels
feature a clip LED next to each
trim control. This light will
illuminate red when the channel’s
input signal reaches 0 dBFS.
Power User Tip: Never run your
input levels higher than the channel
inputs can handle. If you overdrive
the analog-to-digital converters, it
will cause digital distortion, which
sounds terrible and will ruin an
otherwise wonderful recording.
Always set your input levels so that
the clip light rarely, if ever, comes
on. It’s important to remember
that you can usually increase
the level of a recording that is
too quiet, but once a recording is
clipped, there is no way to undo it.