AMC MMA 120X User Manual page 7

MAIN POWER CONNECTOR
Power connector is designed for main powers connecting to amplifier. This connector is combined with fuse
holder.
AC FUSE HOLDER
Please use 2 A, 250 V fuse for amplifier MMA 120X and 4A, 250V fuse for amplifier MMA 240X.
AMPLIFIERS OUTPUT
Use this connector to connect amplifier to the loudspeakers. There are two types of output: Hi-z and Lo-Z.
Hi-z output is designed for loudspeakers with built-in impedance matching transformer. Hi-z output can
be switched by zone selection switch in order to broadcast announcement or background music to the
desired zone. Lo-Z output suitable for speaker without 100V matching transformer.
IMPEDANCE SELECTOR
This switch allows to select "Hi-z or Lo-Z amplifier's output.
CONNECTOR FOR PAGE STATION 5 MICROPHONE
This connector is suitable for page station 5 microphone. Don't connect any other devices to this
connector, othervice amplifier and connected device will be damaged.
ANTENNA CONNECTORS
If amplifier is supplied without the
part of music source module, so connector is included to module package.
AMP IN AND PRE-AMP OUT CONNECTORS
PREAMPLIFIER OUTPUT - line level output directly from unit preamplifier. AMPLIFIER INPUT - line level input
directly to device power amplifier. Preamplifier output and amplifier input are designed to insert signal
processor such as equalizer or limiter. Please note that AMP IN and PRE-AMP are designed before the master
potentiometer, so master doesn't affect audio level in these connectors. Please check block diagram to find
location where connectors are inserted to amplifiers layout.
LINK IN AND LINK OUT CONNECTORS
LINK OUTPUT - line level output linked from unit preamplifier. LINK INPUT - line level input linked to device
power amplifier. Please note that LINK IN and LINK OUT are designed before the equalizer and master
potentiometer, so equalizer and master don't affect audio in these connectors. LINK IN and LINK OUT
connectors are suitable to link audio signal from MMA 120X or MMA 240X to another amplifier or to audio
recorded etc. Please check block diagram to find location where connectors are inserted to amplifiers layout.
CHIME/SIREN LEVEL CONTROL
Chime and siren audio level can be adjusted by using Chime/Siren level control.
REMOTE MICROPHONE GAIN CONTROL
This knob allows adjust remote microphone input gain.
REMOTE MICROPHONE CONNECTOR
This is highest priority balanced input for dynamic remote microphone.
CHIME CONNECTOR
This connector designed for external chime activation button. In order to activate chime, connector's contacts
should by connected with each other for a short time.
MICROPHONE INPUT IN PARALLEL TO STEREO RCA
This is balanced input with 6,3mm jack connector in parallel with stereo RCA. Gain of this input can be
adjusted by using gain control knob located above connectors.
music source module, this connector is not installed. Antenna connector is