Installation; Mounting The Alero Into An Equipment Rack; Ventilation; Rack Mount Safety Instructions - AMX ALR-AMP-8 Instruction Manual

Installation

Mounting the Alero into an Equipment Rack

The Alero ALR-AMP-8 can be mounted in a 19" equipment rack or on a solid flat surface.
Use the included removable rack ears and removable feet for mounting.

Ventilation

NOTE: The maximum operating ambient temperature is 45°C (113°F).
To ensure that the rack enclosure is adequately ventilated, there must be a minimum of 3" all around the Alero unit.

Sufficient airflow must be achieved (by convection or forced-air cooling) to satisfy the ventilation requirements of all the

items of equipment installed within the rack.

Rack Mount Safety Instructions

Mounting of the equipment in the rack should be such that a hazardous condition is not achieved due to uneven mechanical

loading.
Consideration should be given to the connection of the equipment to the supply circuit and the effect that overloading of

the circuits might have on over current protection and supply wiring. Appropriate consideration of equipment nameplate
ratings should be used when addressing this concern.
Reliable earthing of rack-mounted equipment should be maintained. Particular attention should be given to supply

connections other than direct connections to the branch circuit (e.g. use of power strips).

Wiring and Connections

NOTE: All speaker wire connections must be made with the amplif ier off. The amplif ier must be off whenever you make changes to the
input connections.

Connecting Audio Source Devices

Source Devices connect to the Audio (Signal) Inputs connectors on the rear panel. (FIG. 4):
Audio Input connectors (L/R pairs for 8 stereo inputs, 16 total)
FIG. 4
The Audio Inputs consist of 16 RCA/phono terminals; each of the single-ended input channels having a signal input and

ground.
Each Zone (1-8) consists of two channels (odd and even) that represent the left and right channels in a stereo pair. For

example, CH1 and CH2 represent the left and right channels for Zone 1.

Audio (Signal) Inputs

The following table provides pinout information for the Audio Inputs:
Audio Input Connectors - Pinout Information
PIN Function
1 Signal +
2 Signal GND

SE/BTL (Stereo/Bridge Mode) Switches (1-8)

The ALR-AMP-8 features eight SE/BTL slide switches (located between the two RCA/phono input connectors for each Zone - see
FIG. 4). These switches provide the ability to set each of the eight Zones to either Stereo Mode (SE) or Bridge Mode (BTL). Note that
by default, all Audio Inputs are set to Stereo Mode.
Stereo Mode (SE): In Stereo Mode, both channels are used for stereo audio input. Stereo mode provides true stereo

separation between the left and right channels in each Zone.
Bridge Mode (BTL): Bridge Mode uses one input channel of the amplifier to combine the power from both channels output

into one single output. In Bridge Mode, the odd channels are used for audio input and the even channels are disconnected
internally.
ALR-AMP-8 Alero 8 Zone Power Amplifier - Instruction Manual
Left Channel Inputs (Stereo Zones 1-8)
CH1, 3, 5, 7, 9, 11, 13 and 15 are used for inputs in Bridge Mode
Right Channel Inputs (Stereo Zones 1-8)
Description
Single Ended Signal Positive
Single Ended Signal GND
Type
Input
GND
Installation
SE/BTL (Stereo/Bridge Mode)
switches 1-8 (one per Zone)
10