API Audio 1608 Recording Console - Manual (Page 12)

11
MUTE GRP (Mute Group): Assigns the channel to the master Mute Group
 All channels assigned to the master Mute Group will mute when the MUTE GROUP
button on the 845B Central Facilities Module is pressed
 Illuminates when engaged
NOTE: If the channel MUTE GRP button and the AUX PRE=MTE button on the 845B
Central Facilities Module are engaged, all pre-fader Echo/Auxiliary Sends will be muted
when the master MUTE GROUP button is engaged.
2.3 Preamp Section
Line Input: Accepts balanced, low-impedance, line-level signals from the LINE INPUT connector.
The Line Input has the following features:
 -6 dB Pad
 Peak Indicator
 Polarity Inverter (phase reverse)
Note: Line Input is the default channel input.
Microphone Input: Accepts balanced, low-impedance, microphone-level signals from the MIC
INPUT connector. It’s the classic API 212L microphone preamplifier with the following features:
 +65dB of gain
 -20 dB Pad
 Peak Indicator
 Polarity Inverter (phase reverse)
 48v Phantom Power
Note: The MIC button must be engaged to use this input.
Note: The signal from the Microphone Input is replaced with the signal from the
Instrument Input when a 1/4” plug is inserted in the Instrument Input jack.
Instrument Input: Accepts unbalanced, high-impedance, instrument-level signals from the 1/4"
INSTRUMENT INPUT connector. The Instrument Input reduces the need for separate Direct
Injection (DI) boxes and has the following features:
 +45dB of gain
 Peak Indicator
Note: The MIC button must be engaged to use this input.
Note: The Instrument Input jack is a switching jack. The signal from the Microphone
Input is replaced with the signal from the Instrument Input whenever a 1/4” plug is
inserted in the Instrument Input jack.
Note: The Pad and Polarity Inverter (Phase Reverse) do not apply to the Instrument
Input. If these functions are needed, the use of an external Direct Injection (DI)
box connected to the Microphone Input is suggested.
The Preamp section of the 548B provides three audio input options:
 Line Input
 Microphone Input
 Instrument Input
A Peak Indicator is located at the output of the Preamp. The MIC
button serves as the Peak Indicator and turns red when peaks cross
the threshold set on the 840B Central Facilities Module.
Note: The Peak Indication LED functions in MIC, LINE or
INSTRUMENT mode.