Speaker Output Terminal Strip
The screw terminals on the left hand side of the strip allow access to the direct speaker outputs of the
amplifier. The screw terminals on the right hand side are for activation of the in-built 4 tone generator.
Reading from left to right the terminals are:
COM Common or “-” for low impedance speaker loads (4 or 8 ohms).
4 Positive “+” for 4 ohm speaker loads (use with common) (AMIS120 only)
8 Positive “+” for 8 ohm speaker loads (use with common)
COM Common or “-” for 70v or100v speaker loads (maximum load of 80 ohms at 100v
AMIS120 & 160 Ohms at 100v AMIS60)
70 Positive “+” for 70v line speaker loads (use with common)
100 Positive “+” 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 simultaneously, ensure that neither output is loaded to maximum.
Spare
Tone Generator Common (use with one of the 4 tones listed below)
Pre-Announce Chime
Alert Tone
Bell Chime
Evacuation Tone
24 volt DC
Vox Relay Out
VCA
Note:
The minimum impedance (or maximum load) at 100 volt line should be no less than 80 Ohms for
the ACM120 and no less than 160 Ohms for the AMIS60.
Speaker (Zone) Output Terminal Strip
Reading from left to right, these screw terminal pairs correspond to the switched 100 volt line outputs and
are numbered 6 through 1 as indicated on the front panel of the amplifier. For each pair, the left hand
terminal is the 100 volt output and the right hand terminal is the common.
Phantom Power Button
This button enables or disables the 15 volts DC phantom power which is available on all microphone inputs
(XLR’s). The “in” position indicates that phantom power is ‘on’ for all mics. The “out” position means that
phantom power is switched ‘off’ for all mics. Phantom power is required for electret condenser
microphones that require DC power to operate. While some of these microphones can operate from an
internal battery, having phantom power available on the amplifier eliminates the need to regularly change
batteries in the microphone. While phantom power is not required for the more common Dynamic
microphones, it will not damage them providing they are balanced. Do not plug an unbalanced microphone
in to any amplifier or mixer when phantom power is switched ‘on’.
Line Output
The balanced XLR line level output provides a maximum of 700mV to allow for the connection of up to 6
power amplifiers. Simply run a balanced cable from the line out of the AMIS60 or AMIS120 to the line
input of the power amplifier. Pin connections are: pin #1-earth; pin #2-signal (high, +); pin #3-signal (low,
-).
(2 pages)
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