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Soundcraft Si Compact User Guide 0311
WIRING UP
Mic Input
The MIC input accepts XLR-type connectors and is designed to suit a wide range
of BALANCED or UNBALANCED signals, whether from delicate vocals requiring
the best low-noise performance to drum kits to high level line sources.
Stereo Line Inputs
Accepts 3-pole 6.35mm (1/4") jacks, or 2-pole mono jacks which will
automatically ground the ‘cold’ input. Use these for input for sources such as
keyboards, drum machines, synths, CD players etc.
The input is BALANCED for low noise and immunity from interference, but you
can use UNBALANCED sources by wiring up the jacks as shown, although you
should then keep cable lengths as short as possible to minimize interference
pick-up on the cable.
NOTE: The ring must be grounded if the source is unbalanced
Insert Returns
Accepts 3-pole 6.35mm (1/4") jacks, or 2-pole mono jacks which will
automatically ground the ‘cold’ input. Use this when utilizing the Insert Send
& Return functions to allow insertion of special effect or dynamic processors.
AES Input:
This is a balanced 2-channel digital input using a single XLR wires as per the
balanced mic inputs. Although it is possible to use standard balanced audio
cable with AES signals it is recommended to use AES cable which has the correct
110R impedance.
DO NOT use UNBALANCED sources with the phantom power
switched on. The voltage on pins 2 & 3 of the XLR connector may
cause serious damage. BALANCED dynamic mics may normally be
used with phantom power switched on (contact your microphone
manufacturer for guidance)
