Overview: The AudioBox USB utilizes high-grade components to ensure
optimum performance that will last a lifetime. Loaded with two high-headroom,
Class A, microphone preamplifiers; a built-in 2x2 USB 1.1 recording and playback
engine; MIDI I/O; and PreSonus Studio One Artist recording software, the
AudioBox USB offers excellent music performance and production. All you need is
a computer with a USB connection, a few microphones and cables, powered
speakers, and your instruments, and you are ready to record in the studio or in
front of a live audience.
24-Bit/48kHz DAC: The AudioBox USB employs a
high-definition 24-bit/48kHz analog-to-digital converter for exceptional sound
quality and recording with up to 108 dB dynamic range.
XMAX Preamps: The AudioBox USB is equipped with PreSonus
XMAX microphone preamplifiers for use with all types of microphones. The net
result of the XMAX preamp design is high headroom, low noise, wide dynamic
range, extended frequency response, and most importantly, musicality and
transparency, with smooth highs, solid deep lows, and everything in between.
XMAX preamplifiers are built with three key elements.
- High Voltage: The XMAX preamplifier runs on power rails
of 30V. Most off-the-shelf, op-amp-based designs run on power rails of 10V
to 18V. Higher-voltage power rails deliver more headroom, deeper lows,
smoother highs, and a richer overall sound.
- Discrete Components: XMAX preamplifiers only use
genuine transistors, resistors, and capacitors. Other Op-amps add noise,
coloration, and harshness to a signal. This discrete design delivers
ultra-low noise and transparency.
- Class A: Class A circuits have no crossover distortion
and deliver purer, clearer, and more musical results than the Class AB
designs that are found in many preamps.
Mic/Instrument Combo Inputs: The AudioBox USB offers two
convenient front-panel mic/instrument combo inputs with global phantom power.
- Microphone Inputs: Both channels of the AudioBox USB
have Mic/Instrument combo jacks. This convenient connector accepts either a
1/4" phone plug or an XLR plug.
- Instrument Inputs: The 1/4" TS connectors on channels 1
and 2 are for use with instruments (guitar, bass, etc.). When an instrument
is plugged into the instrument input, the mic preamp is bypassed, and the
AudioBox USB becomes an instrument preamplifier.
- 48V Phantom Power: The AudioBox USB provides 48V
phantom power for the microphone input on each channel. Press the 48V button
to enable phantom power for all microphone inputs.
Note: Active instruments are those that have an internal
preamp or a line-level output. Active instruments should be plugged into a
line input rather than into an instrument input. Plugging a line-level
source into the instrument inputs on the front of the AudioBox 22/44VSL not
only risks damage to these inputs but also results in a very loud and often
distorted audio signal.
USB 1.1 Port: The AudioBox USB's USB 1.1 port is where you
connect the included USB cable from the USB to your computer. The AudioBox
USB is bus-powered via this connection and does not require an external power
Controls: The AudioBox USB provides the following
- Mixer: The Mixer knob allows you to blend your input
signals with the playback streams 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 to the right will increase the
level of the playback stream relative to the input signal.
- Phones: The Phones knob controls the volume of the
headphone output on the front of the unit.
- Main: The Main knob controls the output level for the
Main Outputs on the back of the AudioBox, with a range of -80 dB to 0 dB.
Note: When creating monitor mixes using Virtual
StudioLive software, it is important that you turn the Mixer knob all the
way to the VSL position. Monitoring both the input signal and the playback
stream will create a doubling effect that will make monitoring difficult
Main Outs & Headphone Out: The PreSonus AudioBox USB
features two 1/4" main outputs. The output level of the Main Outs is controlled
by the Main volume knob on the front of the unit. The AudioBox USB is also
fitted with a 1/4" headphone jack for connecting a set of headphones for
MIDI I/O: MIDI stands for "Musical Instrument Digital
Interface". MIDI inputs and outputs allow connection to, and communication with,
external MIDI equipment. One function of these ports is MIDI sequencing but the
MIDI protocol can be used for much more than instruments and sequencing.
Note: MIDI is not audio but is frequently used to
trigger or control an audio source (such as a plug-in or synthesizer). It's
important to ensure that your MIDI data is correctly sent and received by
the appropriate hardware or software devices. If the devices generate audio,
you may also need to return the audio to an AudioBox USB input channel.
Studio One Artist Software: The included PreSonus Studio One
Artist recording software comes with over 6 GB of plug-ins, loops, and samples,
you everything you need for music recording and production.
- 20 High-Quality Native Plug-Ins: Amp modeling (Ampire),
delay (Analog Delay, Beat Delay), distortion (Redlight Dist), dynamics
processing (Channel Strip, Compressor, Gate, Expander, Limiter, Tricomp),
equalizer (Channel Strip, Pro EQ), modulation (Autofilter, Chorus, Flange,
Phaser, X-Trem), reverb (MixVerb, Room Reverb), and utility (Binaural Pan,
Mixtool, Phase Meter, Spectrum Meter, Tuner).
- Over 6 GB of Loops, Samples, and Instruments: Presence
virtual sample player, Impact virtual drum machine, SampleOne virtual
sampler, Mojito virtual analog-modeled subtractive synthesizer.
Note: You can use the AudioBox USB with any
audio-recording application that supports Core Audio or ASIO.
Computer System Requirements: Below are the minimum
computer-system requirements for the AudioBox USB.
- Windows XP SP3, Vista x64/x32 SP2, Windows 7 x64/x32 SP1, Windows 8
- Intel Core Duo or AMD Athlon X2 processor (Intel Core 2 Duo or AMD
Athlon X4 or better recommended)
- 2 GB RAM (4 GB or more recommended)
- Mac® OS X 10.6.8 or later
- Intel Core Duo processor (Intel Core 2 Duo or Intel Core i3 or
- 2 GB RAM (4 GB or more recommended)
Note: Your compatible Windows or Mac computer will also
need a USB 1.1 port, Internet connection (for activation), DVD-ROM drive,
Monitor (1024x768 or greater), 20GB hard-disk space, 7200 RPM
internal/external storage drive.
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