Australian Monitor AMIS120P - Manual (Page 3)

The inlet is equipped with an in-built AC fuse holder fitted with a 4 Amp slow blow fuse plus a spare fuse.
Please ensure that the mains power cord is disconnected before attempting to check or
replace this fuse. Power consumption is 300 VA (max).
230V/240V Slide Switch
The operating voltage of the amplifier is user selectable between 230V and 240V via a slide switch located
on the right of the AC inlet. This switch should be set to match the AC voltage of your country
24 Volt DC Power Inlet
The AMIS120P feature optional 24VDC power to run off a battery back-up 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’.
Speaker Output Terminal Strip
Located at the top left of the rear panel is the speaker output terminal strip. Reading from left to right, the
connections are:
COM Common or “-” for low impedance speaker loads (4 or 8 ohms).
4 The “+” for 4 ohm speaker loads (use with common)
8 The “+” for 8 ohm speaker loads (use with common)
COM Common or “-” for 70v or 100v speaker loads (maximum load of 80 ohms at 100v)
70 The “+” for 70v line speaker loads (use with common)
100 The “+” for 100v line speaker loads (use with common)
Please ensure that the correct “Common” is used. Low impedance and 70/100v loads can be used
simultaneously but please pay careful attention to the overall speaker load. When used individually, the low
impedance load should be 4 ohms or higher while the 100v line load should not fall below 80 ohms. When
both outputs are used simultanously, ensure that neither output is loaded to maximum.
Level Control
Located to the left of the XLR input/output is a recessed screwdriver adjustable level control. The level
control is an input attenuation control normally used to match the amplifier to a wide variety of input
signals. In essence, the amplifier is designed to receive a 700mv input signal however, the level control can
be used to increase the level for lower signals or decrease the level for higher input signals. In normal use,
the level control is used as a ‘set and forget’ master level control for the amplifier.
XLR Audio Input and Parallel Output
The AMIS120P includes both male and female 3 pin XLR connectors. While the female is normally used
as the input to the amplifier, both XLR’s are connected in parallel so either will work. When signal is
connected to one XLR, the other XLR becomes a line level output allowing the input signal to be
distributed (split) to other amplifiers. In some projects, the same input may be looped through to multiple
amplifiers using this method. Up to 6 amplifiers can be looped together without any noticeable loss in level.
A distribution amplifier should be used when more than 6 amplifiers need to be looped.
The XLR’s are wired as follows: Pin 1: Shield. Pin 2: Hot, +, Positive. Pin 3: Cold, -, Negative
Fuse Sizes
Mains, 230VAC: 4 Amperes Slow Blow.