Australian Monitor. AMIS120XL User Manual

Clever Features, Contactor Friendly

Operating Manual

AMIS120XL, 120 Watt Mixer Amplifier

Product Description

The ACM120XL is a 120 watt mixer amplifier designed for commercial installations. It features 8
microphone/line input channels and can be used for either low impedance (4 or 8 ohm) or 25v/70v line
speaker systems. A host of unique features including multiple levels of muting, a VOX relay output,
Transformer Balanced 600 Ohm Telephone input, 24 VDC operation and VCA master level control make
the AMIS120XL a very flexible amplifier. The unit can be mounted in a standard 19” equipment rack (rack
ears supplied) or it can be located on a shelf or table.

Front Panel Features

Microphone/Line Level Controls

The level controls for the 8 inputs are labeled Ch1-Ch8. These level controls are used to set up a suitable
“mix” of all the various input sources connected to the AMIS120XL. For example, microphones, CD
players, cassette decks etc. Once a suitable mix of all inputs has been set up, the overall level can then be
adjusted by the “Master” level control on the far right of the AMIS120XL front panel.

Bass Control

The Bass control is part of a 3-band equalization system within the AMIS120XL. The Bass control allows
the user to increase or decrease the amount of bass in the system. The control allows for 12dB of cut or
boost at 100Hz. If no bass cut or boost is required, the control should be left in the center (0) position.

Mid Control

The Mid control is part of a 3 band equalization system within the AMIS120XL. The Mid control allows
the user to increase or decrease the amount of mids in the system. The control allows for 10dB of cut or
boost at 600Hz. Depending on the speakers and application, a small cut (decrease) in the mids normally
makes the system sound ‘warmer’. If no mid cut or boost is required, the control should be left in the center
(0) position.

Treble Control

The Treble control is part of a 3 band equalization system within the AMIS120XL. The Treble control
allows the user to increase or decrease the amount of treble in the system. The control allows for 9dB of cut
or boost at 10kHz. Generally, a small increase of the treble control makes a system sound ‘brighter’. If no
treble cut or boost is required, the control should be left in the center (0) position.

Master Control

The master control sets the overall output level of the AMIS120XL. It is used in conjunction with the input
level controls. When setting up levels, please ensure that proper gain structure practices are followed. In
other words, it is not advisable to run the input channels at 10 and the output level at 1. Instead, aim to keep
all of the input controls and the master control at around the same level.

Power Switch and “On” LED

The black rocker switch on the right hand side of the front panel is used to switch the amplifier on and off.
The ‘up’ position is on. When the amplifier is connected to an appropriate AC power source and is
switched on, the blue LED will illuminate. This LED will always be on when operating on 24VDC.

Signal LED

The green “Signal” LED located next to the ’On’ LED indicates that the AMIS120XL is passing audio. The
signal LED is a simple method to trouble-shoot installations especially in multi-amplifier projects.

Rack Mounting

The AMIS120XL is supplied with rack ears attached to allow mounting within a standard 19” equipment
rack. As is the case with almost all audio products, adequate ventilation and air flow is required. When
installing multiple AMIS amplifiers within the one rack, it is recommended that at least 1 rack unit of
ventilation space is left between every two amplifiers.

For table or shelf mounting, the rack ears can be removed using a screwdriver. Once the rack ears are
removed, please reinstall the screws.

Rear Panel Features

AC Power Inlet

The 3 pin IEC power inlet is located at the bottom left of the rear panel and accepts a standard mains power
lead fitted with an IEC connector. The operating voltage is 115volt @60 Hz and the inlet is equipped with
an in-built AC fuse holder fitted with a 8 Amp slow blow fuse plus a spare fuse. Power consumption is 250
watts (max).

---Please ensure that the mains power cord is disconnected before attempting to check or replace this
fuse.---

24 Volt DC Power Inlet

The AMIS120XL features optional 24VDC power to run off a battery supply if required. This is connected
via the rear terminal strip. The front panel Power Switch will not switch DC power ‘on’ or ‘off’ in DC
operation. In this mode the amplifier is always ‘on’.