The PreSonus AudioBox 44VSL is a 4 x 4 USB 2.0 audio/MIDI interface with 4 Class A XMAX microphone preamplifiers.

Using your computer and the bundled PreSonus Virtual StudioLive (VSL) software, the AudioBox 44VSL interface provides reverb and delay effects and the same Fat Channel compression, limiting, semi-parametric EQ and high-pass filter as the PreSonus StudioLive 16.0.2 digital mixer - all with inaudible latency.

Thanks to the power of VSL, the AudioBox 44VSL includes an 8x4 software mixer. As a result, with just an AudioBox 44VSL and your laptop or other computer running VSL, you can mix a studio session or a live show while monitoring and recording with or without real-time effects. This is all done simply and easily, with no hardware mixer, no outboard effects rack and minimal wiring, thanks to the tight integration between PreSonus hardware and software.

Features

Input/Output:
2 dual-purpose, front-panel, mic/instrument input channels with:
Combo XLR mic and balanced 1/4" instrument input
Class A XMAX™ mic / instrument preamp
Individual channel-trim controls with 0 to +35 dBu mic gain range
2 dual-purpose, front-panel, mic/line input channels with:
Combo XLR mic and balanced ¼" line input
Class A XMAX™ mic preamp
Individual channel-trim controls with 0 to +35 dBu mic gain range
2 balanced 1/4” main (L/R) line outputs
4 balanced 1/4” auxiliary (L/R) line outputs
1 stereo 1/4” headphone output with level control
MIDI In/Out
1 USB 2.0 port
True +48V phantom power for condenser microphones (global)
Mixer control (blends the input signal with the computer playback stream for zero-latency analog monitoring)
Main-output level control
Power/USB sync LED
LED clip indicator for each channel
Mix, adjust input and playback-returns levels, and add effects and signal processing from your laptop or other computer

Digital:
24-bit resolution and 44.1, 48, 88.2, and 96 kHz sampling rate
Professional-grade A/D/A converters (+114 dBu dynamic range)
Zero-latency analog monitoring with playback/input Mix control knob
Mac®- and Windows®-compatible, including Mac OS X 10.7 Lion and Windows 7
Supports ASIO, Core Audio, Direct Sound (Windows XP), Windows Audio Session API (Windows Vista and Windows 7)

Physical:
1/2U rack-mountable (screw-mount to standard rack tray, not included)
Road-rugged construction with all-metal chassis and metal knobs
Weighs 2.6 lb. (1.2 kg)
12 VDC external power supply (included)

Bundled Software:
Virtual StudioLive™ (VSL) ultra-low-latency control and effects software for Mac® and Windows®; manages:
Near-zero-latency monitoring with extensive signal processing
8x4 DSP mixer
StudioLive™16.0.2 Fat Channel compressor, limiter, expander, high-pass filter, and semi-parametric EQ for each analog input, and analog output and its DAW return
2 stereo effects buses with reverb and delay
More than 50 Fat Channel DSP presets for enhancing instrument and vocal recordings
Studio One® Artist 2:  PreSonus’ revolutionary digital audio workstation for Mac and Windows, with unlimited track count and 10+ GB of third-party resources. With Studio One's Nimbit® extension, you can immediately start selling your music.

Specifications

Microphone Inputs:
Connector Type:  Combo, XLR, female, balanced
Mic Preamp EIN:  -133 dB, 20 kHz BW, max gain, Rs=40 Ohms, A-wtd
Frequency Response:  20 Hz - 22 kHz, +/- 0.25 dB, unity gain
THD+N:  0.002%, +4 dBu, 1 kHz, unity gain, 22 kHz BW, A-wtd
S/N Ratio:  97 dB, +4 dBu, 1 kHz, unity gain, 22 kHz BW, A-wtd
Gain Control Range:  -15 dB to +65 dB
Input Max Headroom:  +16 dBu, < 0.5% THD
Input Impedance:  1.7 kOhms
Phantom Power:  +48 VDC, 32 mA total unit

Line Inputs:
Connector Type:  Combo, 1/4” TRS, female, balanced
Frequency Response:  20 Hz - 22 kHz, +/- 0.25 dB, unity gain
THD+N:  0.002%, +4 dBu, 1 kHz, unity gain, 22 kHz BW, A-wtd
S/N Ratio:  98 dB, +4 dBu, 1 kHz, unity gain, 22 kHz BW, A-wtd
Gain Control Range:  -20 dB to +20 dB
Input Max Headroom:  +21 dBu, < 0.5% THD
Input Impedance:  10 kOhms

Instrument Inputs:
Connector Type:  Combo, 1/4” TS, female, unbalanced
Frequency Response:  20 Hz - 22 kHz, +/- 0.25 dB, unity gain
THD+N:  0.003%, +4 dBu, 1 kHz, unity gain, 22 kHz BW, A-wtd
S/N Ratio:  89 dB, +4 dBu, 1 kHz, unity gain, 22 kHz BW, A-wtd
Gain Control Range:  -30 dB to +50 dB
Input Max Headroom:  +21 dBu, < 0.5% THD
Input Impedance:  1 Megohm

Analog Outputs:
Connector Type:  1/4” TRS, female, impedance balanced
Frequency Response:  20 Hz - 22 kHz, +/- 0.25 dB
THD+N:  0.003%, 1 kHz, 22 kHz BW, A-wtd
S/N Ratio:  109 dB, 1 kHz, 22 kHz BW, A-wtd
Output Level:  +10 dBu, <0.5% THD
Output Impedance:  51 Ohms

Headphone Outputs:
Connector Type:  1/4” TRS, female, stereo
Maximum Power:  120 mW/ch @ 60 Ohm load
Frequency Response:  20 Hz - 20 kHz, +/- 0.5 dB, max gain
THD+N:  0.01%, 1 kHz, max gain, 20 kHz BW, A-wtd
S/N Ratio:  96 dB, 1 kHz, max gain, 20 kHz BW, A-wtd

Digital:
ADC Dynamic Range:  114 dB, 48 kHz, A-wtd
DAC Dynamic Range:  114 dB, 48 kHz, A-wtd
Host Interface:  USB 2.0 high-speed
Bit Depth:  24-bit
Sample Rates:  44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz
Maximum Latency:  6 ms, analog input to analog output
MIDI I/O:  5-pin DIN connectors

Power:
External Power Adapter:  +12 VDC, 1 A, center-positive (included)
Connector Type:  Barrel:  5.5 mm OD, 2.1 mm ID, 9.5 mm length

System Requirements:

Windows:
Windows® 7 x64/x32 SP1, Windows 8 x64/x32
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:
Mac® OS X 10.8 or later
Intel Core Duo processor (Intel Core 2 Duo or Intel Core i3 or better recommended)
2 GB RAM (4 GB or more recommended)

Windows and Mac Systems:
USB 2.0 Port
Internet connection (only for activation)
DVD-ROM drive
Monitor with at least 1024x768 resolution
20 GB hard-disk space
Internal or external 7200 RPM storage drive highly recommended

Physical:
Road-rugged construction with all-metal chassis and metal knobs
Dimensions (HxDxW):  1/2U rack-mount (with standard rack tray, not included); 1.75" x 5.5" x 9.5" (44.45mm x 139.7mm x 241.3mm)
Weight:  2.6 lbs (1.2 kg)

Presonus Audio Box 44VSL (PreSonus Audiobox 44 VSL)