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Specifications

  • 2 in / 4 out USB audio interface
  • 96 KHz, 24-bit conversion
  • 2 Focusrite microphone preamplifiers
  • Red anodised aluminium unibody chassis

Front panel

  • 2 line/mic/instrument combination inputs - high quality XLR/ ¼ “ TRS Jack Combo
  • 2 line/inst switches
  • 2 illuminating “PAD” buttons
  • 2 Gain knobs
  • 2 Gain halo signal indicators
  • 48V Phantom power switch
  • MIDI activity LED indicator
  • USB connection LED indicator
  • “DIRECT MONITOR” control
  • “STEREO/MONO” switch for direct monitor
  • Large monitor level dial (controls headphone and line level outputs)
  • Headphone output - ¼” TRS Jack
  • Headphone level knob
  • “HEADPHONE SOURCE” switch

Rear panel

  • 2 balanced monitor outputs – TRS (channels 1-2)
  • 4 unbalanced outputs – RCA Phono (channels 1-4)
  • MIDI IO
  • USB 2.0 Port
  • Kensington Lock slot

Included software

  • Ableton Live Lite 8
  • Focusrite Scarlett plug-in suite
  • Novation Bass Station
  • Loopmasters content

Front panel

2i4 Front panel

2i4 Front panel

Rear panel

2i4 Rear panel

 

Analogue Input Performance
Mic
Frequency Response 20Hz - 20kHz +/- 0.1 dB
THD+N < 0.002% (minimum gain, -1dBFS input with 22Hz/22kHz bandpass filter)
Equivalent Input Noise (EIN) < -120dB: measured at 55dB of gain with 150Ω termination (20Hz/22kHz bandpass filter)
Gain Range +10dB to +55dB   (0dB to +45dB when pad is engaged)
Max Input Level +3.5dBu
Line
Frequency Response 20Hz - 20kHz +/- 0.1dB
THD+N < 0.01% (‘A’ weighted measured with +16dB input gain -1dBFS at output and 22Hz/22kHz bandpass filter)
Noise -90 dBu (22 Hz/22KHz bandpass filter)
Signal to Noise Ratio > 100dB
Gain Range -10dB to +35dB (-20dB to +25dB when pad is engaged)
Max Input Level +26dBu (at 1% THD+N)
Instrument
Frequency Response 20Hz - 20kHz +/- 0.1dB
THD+N 0.0025% (‘A’ weighted measured with 16dB input gain, -1dBFS at output and 22Hz/22kHz bandpass filter)
Noise -87dBu (22Hz/22kHz bandpass filter)
Gain Range +10dB to +55dB (0dB to +45dB when pad is engaged)
Max Input Level +3dBu   (+13dBu pad in)
Analogue Output Performance
Nominal Output Level

0dBFS = +10dBu, balanced

0dBFS = +5.5bBu, unbalanced

Frequency Response 20Hz - 20kHz +/- 0.2dB
THD+N

< 0.0015%, balanced (-1dBFS input 22Hz/22kHz bandpass filter, un-weighted)

< 0.03 %, unbalanced (0dBFS input 22Hz/22kHz bandpass filter)

Output Impedance < 12Ω
Power Output into 32Ω 24mW
Digital Performance
Clock sources Internal clock only
A-D Dynamic Range 105dB 'A-weighted' (all inputs).  Converter chipset A-D dynamic range 114dB
D-A Dynamic Range 104dB 'A-weighted' (all outputs).  Converter chipset D-A dynamic range 114dB
Supported sample rates 44.1 KHz, 48 KHz, 88.2 KHz, 96 KHz
Crosstalk
Input to Input Better than 90dB
Output to Output Better than 90dB
Input to Output Better than 85dB
Input Metering
Ring LED lit Green Signal present (-24 dBFS)
Ring LED lit Red Signal overload (0dBFS), peak held for approximately 1 second
Weight and Dimensions
Height 48 mm 
Width 210 mm 
Depth 140 mm 
Weight 890 g