101 dB\nCommon Mode Rejection Ratio (1 kHz, 55 dB Gain) \t> 55 dB\nGain Control Range (\u00b11 dB) \t-4 dB to 50 dB\nMaximum Input Level (Unity Gain, 1 kHz @ 0.5% THD+N) \t+14 dBu\nSignal Level LEDs \t+10 dBu (0 dBFS)\nRed/Clip (\u00b10.5 dBu) \t+4 dBu (-6 dBFS)\nYellow (\u00b10.5 dBu) \t-8 dBu (-18 dBFS)\nGreen (\u00b10.5 dBu) \t-14 dBu (-24 dBFS)\nPhantom Power (\u00b12 VDC) \t+48 VDC\nInstrument Input (channels 1 and 2 only)\n\t\nType \t\u00bc\u201d TRS Female Unbalanced\nInput Impedance \t1 M\u03a9\nLine Outputs\n\t\nType \t\u00bc\u201d TRS Balanced\nOutput Impedance \t51\u03a9\nDigital Audio\n\t\nADC Dynamic Range (A-wtd, 48 kHz sample rate) \t107 dB\nBit Depth \t24\nReference Level for 0 dBFS \t+10 dBu\nInternal Sample Frequency, Selections \t44.1, 48 kHz\nExternal Sample Frequency, Input \t75\u03a9 BNC\nPower\n\t\nInput Connector Type \tIEC\nInput Voltage (factory configured) \t90 to 230 VAC\nPower Requirements (Continuous) \t20W\nPhysical\n\t\nDimensions \t1U rackmount\nHeight \t1.75\u201d (44.45 mm)\nDepth \t7\u201d (177.8 mm)\nWidth \t19\u201d (482.6 mm)\nWeight \t6 lbs. (2.72 kg)&"}" data-sheets-userformat="{&"2&":513,&"3&":{&"1&":0},&"12&":0}">Set of PreSonus AudioBox 1818VSL and DigiMax D8. When you’re recording a full band, you need an interface with enough I/O to handle the challenge. For these sessions, the AudioBox 1818VSL USB 2.0 audio/MIDI interface has you covered with six mic/line inputs and two mic/instruments inputs, each with a crystal-clear, high-headroom XMAX preamp. Want to track the whole band at once and send to multiple sets of monitors, headphone amps, and outboard gear? Connect a PreSonus® DigiMax™ D8 or DigiMax DP88 8-channel preamp/converter via ADAT Optical and a digital device via S/PDIF for a total of 18 inputs and 18 outputs. The AudioBox 1818VSL records and plays back at sampling rates up to 96 kHz, with remarkably low noise. It features the same Class A XMAX microphone preamplifiers as our StudioLive AI mixers, which are found in recording studios and live venues the world over. The result is clean, pure, audiophile-quality sound. The AudioBox 1818VSL’s two combo mic/instrument and six combo mic/line inputs make it extremely versatile, enabling you to use it with microphones, guitars, keyboards, DJ gear, and more. But that’s just the start: The 1818VSL is loaded with features that make it suitable for almost any studio situation and on the road. DigiMax D8 - For more than a decade, DigiMax-series preamp/converters have been relied on in countless recording studios worldwide. Based on our highly lauded XMAX Class A solid-state preamp, the DigiMax D8 has become a classic, offering eight of these prized preamps—enough to raise your entire studio rig to a higher level. And thanks to its eight-channel, 24-bit ADAT Optical output, the DigiMax D8 provides an excellent front end or expander for ADAT Optical-equipped digital-audio devices, such as our AudioBox 1818VSL, Studio 192, and Studio 192 Mobile audio/MIDI interfaces. A good microphone preamp boosts a mic’s level to almost 400 times that of the original signal, making the preamp one of the most important stages in an audio system. A cheap, off-the-shelf, op-amp-type mic preamp delivers thin, noisy, harsh results. In contrast, PreSonus® XMAX microphone preamps deliver incredibly high headroom, deep lows, smooth highs, and a rich overall sound. With XMAX preamps, your system’s sound quality is limited only by the microphone you plug in.SpecsAudioBox 1818VSLMicrophone InputsConnector Type Combo, XLR, female, balancedMic Preamp EIN -133 dB, 20 kHz BW, max gain, Rs=40, A-wtdFrequency Response 20 Hz - 22 kHz, ±0.25 dB, unity gainTHD+N 0.002%, +4 dBu, 1 kHz, unity gain, 22 kHz BW, A-wtdS/N Ratio 97 dB, +4 dBu, 1 kHz, unity gain, 22 kHz BW, A-wtdGain Control Range -15 dB to +65 dBInput Max Headroom +16 dBu, < 0.5% THDInput Impedance 1.7 kPhantom Power +48 VDC, 32 mA total unitLine Inputs Connector Type Combo, 1/4 ” TRS, female, balancedFrequency Response 20 Hz - 22 kHz, ±0.25 dB, unity gainTHD+N 0.002%, +4 dBu, 1 kHz, unity gain, 22 kHz BW, A-wtdS/N Ratio 98 dB, +4 dBu, 1 kHz, unity gain, 22 kHz BW, A-wtdGain Control Range -20 dB to +20 dBInput Max Headroom +21 dBu, < 0.5% THDInput Impedance 10 kInstrument Inputs Connector Type Combo, 1/4 ” TS, female, unbalancedFrequency Response 20 Hz - 22 kHz, ±0.25 dB, unity gainTHD+N 0.003%, +4 dBu, 1 kHz, unity gain, 22 kHz BW, A-wtdS/N Ratio 89 dB, +4 dBu, 1 kHz, unity gain, 22 kHz BW, A-wtdGain Control Range -30 dB to +50 dBInput Max Headroom +21 dBu, < 0.5% THDInput Impedance 1 MAnalog Outputs Connector Type 1/4 ” TRS, female, impedance balancedFrequency Response 20 Hz - 22 kHz, ±0.25 dBTHD+N 0.003%, 1 kHz, 22 kHz BW, A-wtdS/N Ratio 109 dB, 1 kHz, 22 kHz BW, A-wtdOutput Level +10 dBu, <0.5% THDOutput Impedance 51Headphone Outputs Connector Type 1/4 ” TRS, female, stereoMaximum Power 120 mW/ch @ 60 loadFrequency Response 20 Hz - 20 kHz, ±0.5 dB, max gainTHD+N 0.01%, 1 kHz, max gain, 20 kHz BW, A-wtdS/N Ratio 96 dB, 1 kHz, max gain, 20 kHz BW, A-wtdDigital ADC Dynamic Range 114 dB, 48 kHz, A-wtdDAC Dynamic Range 114 dB, 48 kHz, A-wtdHost Interface USB 2.0 high-speedBit Depth 24-bitSample Rates 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHzMaximum Latency 6 mS, analog input to analog outputADAT Optical I/O Toslink™ connectors, ADAT/SMUX formatsS/PDIF I/O RCA female connectorsWord Clock Output BNC connector, 4.5 Vpp @ 75 loadMIDI I/O 5-pin DIN connectorsPower External Power Adapter +18 VDC, 2.6A, center-positiveConnector Type Barrel: 5.5 mm OD, 2.1 mm ID, 9.5 mm lengthPhysical Dimensions 1U rackmountHeight 1.75” (44.45 mm)Depth 5.5” (139.7 mm)Width 19” (482.6 mm)Weight 4.6 lb. (2.1 kg)DigiMax D8InputsInput Type XLR Female BalancedFrequency Response (±0.5 dB) 20 Hz to 50 kHzFrequency Response (±3.0 dB) 20 Hz to 150 kHzInput Impedance (Balanced) 1600THD+N (unwtd, 1 kHz @ +4 dBu Output, Unity Gain) < 0.003%EIN (unwtd, 55 dB Gain, 150 Input, 20 Hz to 22 kHz) -126 dBuS/N Ratio (Unity Gain, unwtd, Ref. = +4 dBu, 20 Hz to 22 kHz) >101 dBCommon Mode Rejection Ratio (1 kHz, 55 dB Gain) > 55 dBGain Control Range (±1 dB) -4 dB to 50 dBMaximum Input Level (Unity Gain, 1 kHz @ 0.5% THD+N) +14 dBuSignal Level LEDs +10 dBu (0 dBFS)Red/Clip (±0.5 dBu) +4 dBu (-6 dBFS)Yellow (±0.5 dBu) -8 dBu (-18 dBFS)Green (±0.5 dBu) -14 dBu (-24 dBFS)Phantom Power (±2 VDC) +48 VDCInstrument Input (channels 1 and 2 only) Type 1/4 ” TRS Female UnbalancedInput Impedance 1 MLine Outputs Type 1/4 ” TRS BalancedOutput Impedance 51Digital Audio ADC Dynamic Range (A-wtd, 48 kHz sample rate) 107 dBBit Depth 24Reference Level for 0 dBFS +10 dBuInternal Sample Frequency, Selections 44.1, 48 kHzExternal Sample Frequency, Input 75 BNCPower Input Connector Type IECInput Voltage (factory configured) 90 to 230 VACPower Requirements (Continuous) 20WPhysical Dimensions 1U rackmountHeight 1.75” (44.45 mm)Depth 7” (177.8 mm)Width 19” (482.6 mm)Weight 6 lbs. (2.72 kg)