Back Panel - Focusrite Scarlett 4i4 User Manual

7. MONITOR – main monitor volume control, sets the level at rear panel Outputs 1 and 2
8. Headphone level – adjusts the output level at the front panel stereo headphone output.
9. Headphone socket - ¼" TRS output jack – connect your stereo headphones here.
10. USB LED – illuminates when the unit receives USB bus power and is confirmed by the
computer as connected and operating correctly.
11. MIDI LED – illuminates when MIDI data is received at the MIDI IN port.

Back Panel

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12. LINE INPUTS 3 and 4 – 2 x ¼" TRS jacks; these are balanced inputs for use with additional line
level sources e.g., from a keyboard, synth module or FX unit.
13. LINE OUTPUTS 1 and 2 - 2 x ¼" (6.35 mm) TRS jack sockets, electronically balanced. The level
at these outputs is adjusted by the front panel MONITOR control, the maximum output level
is +10 dBu. Either ¼" TRS (balanced connection) or TS (unbalanced connection) jack plugs
can be used.
14. LINE OUTPUTS 3 and 4 - 2 x ¼" (6.35 mm) TRS jack sockets, electronically balanced. The
level at these outputs may be adjusted from Focusrite Control; the maximum output level is
+10 dBu. Either ¼" TRS (balanced connection) or TS (unbalanced connection) jack plugs can
be used.
15. MIDI IN and MIDI OUT – standard 5-pin DIN sockets for connection of external MIDI equipment
such as keyboards or sound modules. The Scarlett 4i4 provides a convenient MIDI interface
with your DAW, making a computer MIDI card unnecessary.
16. USB 2.0 port – Type C connector; connect to your computer with cable supplied.
17. K (Kensington security lock) – secure your Scarlett 4i4 to a suitable structure if desired.
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