Functions And Settings; Power Supply; Operation; Adjusting The Volume - Pro Audio AM412R User Manual

- 2 - FUNCTIONS AND SETTINGS

The amplifier is especially designed for the application in 100 V PA systems. 100 V outputs for five PA zones
are available. Via inputs on the rear panel, microphones or units with line output may be connected. Can
be installed into the extension compartment the CD/tuner/USB Module
• Disconnect the amplifier from the main supply.
• Screw off the housing cover of the amplifier and the cover on the front side of the unit.
• Insert the CD/ tuner module into the cutouts which are uncovered when removing the cover and screw
it tightly.
• Connect the connector to the corresponding slot.
• Remove the cover on the rear panel and fix the antenna connector.
NOTE - CD412S - CD/MP3/tuner module optional. USB412S - MP3 from USB/tuner module optional.

2.1 POWER SUPPLY

Connect the supplied main cable to a socket (230V~/50-60Hz).

2.2 OPERATION

Use the following procedure when turning on your amplifier:
• Turn down the LEVEL CONTROLS and the MASTER of the amplifier.
• Switch on the amplifier with the POWER SWITCH. The POWER INDICATOR (6) should be brighten.

2.3 ADJUSTING THE VOLUME

• Turn up the LEVEL CONTROLS on the amplifier until the desired loudness.
• Adjust the general level coming from each input with the MASTER of the amplifier. In case of overload
the red LED PROTECT lights up in the level indication. Then reduce the volume with the control MAS-
TER. It may be necessary to adjust once again the volume of the input signals with the corresponding
LEVEL CONTROLS; Do not change the control MASTER.
• Turn the LEVEL CONTROLS of the inputs not used to zero.
• If necessary adjust the sound with the controls EQUALIZER.
NOTE - For the inputs on the rear panel, the input sensitivity can be adjusted with the controls GAIN. If a
level control must be turned up very much or almost be closed to obtain the desired volume ratio to the
other inputs, modify the input sensitivity with the corresponding control GAIN.

2.4 ACTIVATING THE PA ZONES

Switch on the zones to be used for PA applications with the buttons 1 - 5 ZONE SELECTOR. For announce-
ments to all zones press the button ALL ZONE SELECTOR. The volume of the zones has been set on MASTER.

2.5 RELIABILITY PROTECTION FUNCTION

The AM412R/AM430R amplifier is fitted with a series of extremely efficient protection, against overload,
overheating and short circuit at the speaker outputs, which ensure they can always be used with the ut-
most security. Possible interventions to eliminate the reason for the fault, e. g.:
• In case of overload reduce the number of speakers connected or, if possible, adjust a lower power
consumption on the speakers.
• In case of overheating provide a better air circulation.
• In case of short circuit at a speaker output, locate the position for the short circuit and eliminate it.
AM412R/AM430R
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