API Audio 1608 Recording Console - Manual (Page 45)

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9.0 Rear Panel
9.1 548B Channel Module Connections
The rear panel connections for the 548B Channel module are as follows:
DIRECT OUTPUT:
 Balanced, Line-level
 Male XLR
INSERT RETURN (FADER INPUT):
 Balanced, Line-level
 1/4” tip-ring-sleeve switching jack
 Replaces the EQ Out signal when a jack is inserted
and the INS button is engaged
INSERT SEND (EQUALIZER OUT):
 Balanced, Line-level
 1/4” tip-ring-sleeve switching jack
 The feed to the Insert Return (Fader Input) is
defeated when a jack is inserted
EQUALIZER INPUT:
 Balanced, Line-level
 1/4” tip-ring-sleeve switching jack
 The Preamp Output signal is replaced with this signal
when a jack is inserted
PREAMP OUTPUT:
 Balanced, Line-level
 1/4” tip-ring-sleeve jack
 Half-normalled to feed the Equalizer Input
INSTRUMENT INPUT:
 Unbalanced, High-impedance
 Instrument-level
 1/4” tip-sleeve switching jack
 The Microphone Input signal is replaced with this
signal when a jack is inserted
MIC INPUT:
 Balanced, Low-impedance
 Microphone-level
 Female XLR connector
LINE INPUT:
 Balanced, Low-impedance
 Line-level
 Female XLR connector