User Guide

Connecting Scarlett 18i20 to loudspeakers

The 1/4” jack MONITOR outputs on the rear panel (Line Outputs 1 and 2) will normally be used to drive

monitoring speakers. Self-powered monitors incorporate internal ampliﬁers with a volume control,

and may be connected directly. Passive loudspeakers will require a separate stereo ampliﬁer; in this

case, the rear panel outputs should be connected to the ampliﬁer’s inputs.

All the line output connectors are 3-pole (TRS) ¼” (6.35 mm) jack sockets, and are electronically

balanced. Typical consumer (hi-ﬁ) ampliﬁers and small powered monitors will probably have

unbalanced inputs, either on phono (RCA) sockets, or via a 3.5 mm 3-pole jack plug intended for

direct connection to a computer. In either case, use a suitable connecting cable with jack plugs at

one end.

Active Speakers

Passive Speakers