Focusrite Scarlett 18i20 USB-C Audio/MIDI Interface (3rd Generation) - Manual (Page 33)

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Physical and Electrical Characteristics
Analogue Inputs 1 & 2
Connectors XLR Combo type: Mic/Line/Inst, on front panel
Mic/Line switching Automatic
Line/Instrument switching 2 x front panel switches or via Focusrite Control
Pad 10 dB attenuation, selected per channel from Focusrite Control
Phantom power Shared +48 V phantom power switch for inputs 1 to 4
AIR function Selected per channel from Focusrite Control
Analogue Inputs 3 to 8
Connectors XLR Combo: Mic/Line, on rear panel
Mic/Line switching Automatic
Pad 10 dB attenuation, selected per channel from Focusrite Control
Phantom power Shared +48 V phantom power switches for inputs 1 to 4 and 5 to 8
AIR function Selected per channel from Focusrite Control
Analogue Outputs
Main outputs 10 x balanced ¼” TRS jacks on rear panel
Stereo headphone outputs 2 x ¼” TRS jack on front panel
Main monitor output level control
On front panel
Headphones level controls
Other I/O
Optical I/O
4 x TOSLINK optical connectors; 8 channels @ 44.1/48 kHz or 4
@ 88.2/96 kHz
S/PDIF I/O 2 x phono (RCA) or via Optical I/O (selected via Focusrite Control)
Word clock output BNC connector
USB 1 x USB 2.0 Type C connector
MIDI I/O 2 x 5-pin DIN sockets