Focusrite Scarlett 18i8 USB-C Audio/MIDI Interface (3rd Generation) - Manual (Page 27)

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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 Via software from Focusrite Control
Phantom power Shared 48 V phantom power switch for inputs 1 and 2
Analogue Inputs 3 & 4
Connectors XLR Combo type: Mic/Line, on front panel
Mic/Line switching Automatic
Phantom power Shared 48 V phantom power switch for inputs 3 and 4
Analogue Inputs 5 to 8
Connectors 4 x balanced ¼” TRS jacks on rear panel
Analogue Outputs 1 to 8
Connectors (Outputs 1 to 4) 4 x balanced ¼" TRS jacks on rear panel
Stereo headphone outputs
(Outputs 5 to 8)
2 x ¼” TRS jacks on front panel
Main monitor output level control
On front panel
Headphones level controls
Other I/O
Optical input
TOSLINK optical connector carrying 8 channels @ 44.1/48 kHz
or 4 channels @ 88.2/96 kHz in ADAT format
S/PDIF I/O
2 x phono (RCA) or via Optical input (selected via Focusrite
Control)
USB 1 x USB 2.0 Type C connector
MIDI I/O 2 x 5-pin DIN sockets