Operating instructions

Functions description
PROTECT INDICATOR
This LED lights up for a few seconds after the iA 480X is powered on and then turns off if the amplifier is not
damaged. This LED also lights when overheating or other service problems occur. It is normal for the protection
LED to fade slowly when the amplifier is powered off.
SIGNAL CLIPPING INDICATOR
Lights whenever the channel is outputting signal at full strength and signal is distorted. Reduce signal level to
ensure undistorted output signal.
SIGNAL INDICATOR
LED in the front panel indicates audio signal of the amplifier.
POWER INDICATOR
This LED indicates status of the main power. The LED lights up if the amplifier is powered on.
POWER SWITCH
Power switch is hided with cover to prevent illegal or incidental use. Remove cover using Phillips screwdriver and
use this switch to power on or off the amplifier. The power LED in the front panel lights up if the amplifier is
powered on.
COOLING VENT
Cool air is pulled in through the front panel fan filters and eliminated through the rear panel vents.
VOLTAGE SELECTOR
This switch is used to set the input voltage to the power supply. Setting the power supply voltage switch to the
incorrect input voltage could damage the amplifier. The correct voltage is determined by the country where the
amplifier will be used.
MAIN POWER CONNECTOR
Power connector is designed for main powers connecting to amplifier. This connector is combined with fuse
holder.
HOLDER FOR AC FUSE
Please use 10A, 250V fuse if amplifier is used in ~230V 50Hz electricity system and 20A, 250V fuse if amplifier is
used in ~115V 60Hz system.
LINK FOR DC 24V POWER SUPPLY
This connector is designed to link the DC 24V power to additional amplifier. DC IN and DC LINK connectors are
connected with each other directly, inside the amplifier.
INPUT FOR DC 24V POWER SUPPLY
This connector is designed to power up amplifier when the main power is unavailable. Use only 24V power supply
or batteries and take attention to polarity during the wiring. If both, AC and DC power are connected, amplifier
will use main AC power.
AMPLIFIERS OUTPUT
Use this connector to connect amplifier to the loudspeakers.
GROUND LIFT SWITCH
To eliminate a ground loop, set ground switch to FLOAT position and otherwise to connect a ground to amplifiers
chassis.
LINK OUTPUT
Connect outgoing audio signal from stereo RCA and Phoenix connectors to additional amplifier. Input and link
connectors are connected with each other directly.