Instruction manual

Alero ALR-AMP-8 8 Zone Power Amplifier
3
ALR-AMP-8 Alero 8 Zone Power Amplifier
Front Panel Components (LEDs)
The front panel features three LEDs (see FIG. 1 on page 1):
POWER LED (Green/Red)
The Power LED indicates that the current power state of the amp:
Green indicates that the amplifier is On.
Red indicates that the amplifier is receiving power, but is in Standby mode.
OC/CLIP LED (Yellow/Red)
The OC/CLIP LED indicates that either the current of one or more of the speaker outputs has exceeded its maximum or
that the power supply is overloaded.
Yel lo w indicates an OC (over-current) shutdown of the amplifier output.- In the case of an OC event, the
amplifier will shut down to protect itself, and indicate an OC event on this LED (yellow) and the OC pin (pin
8 on the 10-pin I/O port - see page 10). An OC event can indicate a cable fault, installation fault or defective
speaker.
Red indicates an overload event with the Power Supply. The LED will light red if internal temperature
sensors on the power supply sense an abnormally high temperature, or if power supply over-current/over-
load/power-limit circuits are triggered. In either case, the power supply will limit the amplifier output to keep
the power supply within safe limits, while keeping the music playing.
THERMAL LED (Red)
The Thermal Protection LED indicates thermal shutdown of the individual zones (amplifier boards).
The temperatures of all the output channels are individually monitored, and if one or more of them reaches
the thermal limit (105°C) then the respective Zones will shut down and go into soft start mode
(Channels 1/2 = Zone 1, Channels 3/4 = Zone 2, etc), and the Thermal Protection LED will be lit.
The other Zones will continue to be active. When the temperature has dropped below the thermal threshold,
the respective Zone(s) start up again automatically.
Rear Panel Components
The rear panel provides all input, output, control and power connections (FIG. 2):
Refer to the Installation section on page 5 for connector details and wiring information.
The amplifier outputs are limited to 20A peak each in order to protect the power
stages against overload during a short circuit, or over-current event on the output of
the amplifier.
FIG. 2 ALR-AMP-8 Rear Panel
AC Mains
Mains Fuse
Power Switch
Speaker Outputs
Audio Inputs
Stereo/Bridge Mode switches
Zones (1-8) On/Off
Control Input Connector
3-5V Trigger switch (High/Off)
(Zones 1-8 / CH1-16)
(one per Zone)
(Zones 1-8 / CH1-16)
External Signal Sense
switch (On/Off)