SoundCraft SM 16 User Manual page 25

Rear Connectors
Input Module
INPUT (3 pin female XLR)
Pin 1 Ground
Pin 2 Signal (Hot)
Pin 3 Signal (Cold)
HI-Z INPUT, INSERT RETURN (1/4" 3-pole Jack)
Tip Signal (Hot)
Ring Signal (Cold)
Sleeve Ground
DIRECT OUTPUT, INSERT SEND, (1/4" 3-pole Jack)
Tip Signal
Ring Ground Sense
Sleeve Ground
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