ADS 5120D, Руководство по установке и эксплуатации, Страница: 4 / 15

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INTRODUCTION
Features
The ADS 5120 and ADS 5240 are 2-zone mixer amplifiers, ideally suitable for powering
medium and large sound systems. The technically sophisticated built-in features allow a
wide range of applications at a competitive price. Furthermore, the design features make
the amplifier one of the simplest to configure and install, with no internal adjustments or
retrofit options required.
Features include

220-240Vac (at 50Hz) or 24Vdc power operation

24Vdc phantom power - providing a means of distributing current through audio
cables to power microphones and other equipment

volume restoration - restoring volume levels to pre-defined factory or user-
defined settings when initiating communications in areas such as paging,
public address, two-way radio, intercoms and music distribution systems

volume sensitivity and trim controls for all inputs - allowing adjustment to the
level of the incoming microphone or line-level signals to match the internal
operating levels of the mixer unit

six inputs, the first five of which are balanced and feature
o
a ‘universal’ input allowing simple configuration via a slide switch
o
a switch-selectable phantom power supply
o
a switch-selectable, two-note chime, activated when the input priority
terminal is closed
o
a remote volume restoration relay able to be operated when the input
priority terminal is closed

a priority ladder for the first five balanced inputs, where
o
input 1 mutes all other inputs
o
inputs 2 to 5 operate on a ‘first-come-first-served’ basis
o
input 6 has no priority
(when no priority terminal is closed, all inputs act as mixing inputs)

a switchable VOX facility on input 1

two 100V line outputs – ‘Music & Speech’ and ‘Speech Only’ (the ‘Music &
Speech’ output is permanently connected, providing output of all amplifier
traffic; the ‘Speech Only’ output is only connected when a priority is closed; this
can provide paging only, to areas where music is not desired)

separate bass (±10dB at 100Hz), treble (±10dB at 10kHz) and master volume
controls, located on the front panel

compact size, taking up only 2U of rack space (the amplifier is supplied with
19-inch rack mount ears).