The PreSonus AudioBox 1818VSL is an 18x18 single space rackmount USB 2.0 audio/MIDI interface with 8 Class A XMAX preamplifiers.

Using your computer and the bundled PreSonus' Virtual StudioLive (VSL) software, AudioBox VSL-series interfaces provide 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.

With high-end 24-bit, 96 kHz converters, Class A XMAX preamps, ADAT optical I/O, S/PDIF coaxial I/O, word clock output and MIDI I/O, the AudioBox 1818VSL is a great choice for project studios, performing bands, school music labs and a wide variety of corporate installations and other contractor applications.

Thanks to the power of VSL, the AudioBox 1818VSL includes a 26x8 software mixer. As a result, with just an AudioBox 1818VSL and your laptop or other computer, you can mix a studio session or live show featuring a full band - all 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
6 dual-purpose, front-panel, mic/line input channels with:
Combo XLR mic and balanced 1/4" 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
8 balanced 1/4” auxiliary (L/R) line outputs
8 channels ADAT optical input and output (at 44.1 or 48 kHz; 4 channels at 88.2 or 96 kHz)
2 channels (stereo) S/PDIF coaxial input and output
1 stereo 1/4” headphone output with level control
1 BNC word-clock output
MIDI In/Out
1 USB 2.0 port

Meters, Controls, and Features
True +48V phantom power for condenser microphones (switchable in two banks for channels 1-4 and 5-8)
Main-output level control
Power/USB sync LED
LED clip indicator for each channel
L/R main output meter (dual 7-segment LED ladder)

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)
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

1U rack-mountable
Road-rugged construction with all-metal chassis and metal knobs
Weight: 4.6 lbs. (2.1 kg)
18 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
26 x 8 DSP mixer
StudioLive™16.0.2 Fat Channel compressor, limiter, expander, high-pass filter, and semi-parametric EQ for each 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. AB1818VSL Remote (free from the Apple App Store)
Provides iPad® remote control over Virtual StudioLive Software

Specifications

Microphone Inputs:
Connector Type:  Combo, XLR, female, balanced
Mic Preamp EIN:  -133 dB, 20 kHz BW, max gain, Rs=40O, 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
ADAT Optical I/O:  Toslink™ connectors, ADAT/SMUX formats
S/PDIF I/O:  RCA female connectors
Word Clock Output:  BNC connector, 4.5 Vpp @ 75O load
MIDI I/O:  5-pin DIN connectors

Power
External Power Adapter:  +18 VDC, 2.6A, center-positive
Connector Type  Barrel:  5.5 mm OD, 2.1 mm ID, 9.5 mm length

System Requirements

Windows
Windws 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
Dimensions (HxDxW):  1U rackmount; 1.75" x 5.5"x 19" (44.45mm x 139.7mm x 482.6mm)
Weight:  4.6 lbs. (2.1 kg)

Presonus AudioBox 1818 VSL (PreSonus 1818VSL)