API Audio 1608 Recording Console - Manual (Page 44)

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8.3 Echo Send/Return Meters
8.4 Power Supply Voltage Indicators
8.5 Talkback Microphone
The built-in Talkback Microphone is located below the Power Supply Voltage Indicators.
The E1 – E8 Meters display the
output of the eight Echo/Auxiliary
Send Masters (post the Echo Send
Master).
Blue LED indicators are provided for the five power supply voltages:
 +16V
 -16V
 +24V
 +5V
 +48V
The Power Supply Voltage Indicators are located to the left of the E5 and
E7 meters.