Rear Panel Features
AC Power Inlet
The 3 pin IEC power inlet is located on the bottom left of the rear panel and accepts a standard mains
power lead fitted with an IEC connector. The inlet is equipped with an in-built AC fuse holder fitted with a
5 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 400 watts (max).
24 Volt DC Power Inlet
The AMIS604 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’.
Mic/Line Input Terminal Strip
Located on the top half of the rear panel are the input connections for all 4 amplifiers. Each amplifier will
accept balanced microphone or line inputs (selectable via an internal dip switch). Additionally, a remote pot
can be connected to each amplifier for external control of the master level.
The rear panel is split into four sections, one for each amplifier. Looking at the back panel and reading
from left to right the amplifiers are 4, 3, 2 and 1. In other words, the input and output section is directly
behind the relevant front panel controls.
The inputs are labelled Ch1, Ch2 and Ch3. All are balanced with the connection reading left to
right as “Ground, + positive, - negative”. Each input can be switched to be either mic or line level
via a dip switch behind each input and accessible through the top lid. Additionally, phantom
power (+15v DC) is selectable per input. The dip switch settings are:
Balanced Mic Level
- 1 and 2 On
Balanced Line Level
- 1 and 2 Off
Phantom Power (+18v)
- 3 ‘On’ to enable phantom power or ‘Off’ to disable phantom power
VCA Remote Master Level Control
Located on the right side of each input terminal strip is a two position screw terminal block for an external
pot. For remote master level control, an external 500K pot can be connected per amplifier.
Speaker Output Terminal Strip
Located on the bottom half of the back panel is the speaker output terminal strip. Four separate speaker
output terminal strips are provided, one for each amplifier. Looking at the back panel and reading from left
