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Audio Design Services Ltd., St David’s House, Adcroft Street, Higher Hillgate, STOCKPORT SK1 3HW.
INTRODUCTION
Features
The ADS 5240 is a 240 watt rms, 2-zone, mixer amplifier, 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. Further, 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
oa ‘universal’ input allowing simple configuration via a slide switch
oa switch-selectable, 18Vdc phantom power supply
oa switch-selectable, two-note chime, activated when the input priority
terminal is closed
oa 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
oinput 1 mutes all other inputs
oinputs 2 to 5 operate on a ‘first-come-first-served’ basis
oinput 6 has no priority
(when ‘no priority’ terminal is closed, all inputs act as mixing inputs)
•a switchable VOX and Siren facility on input 1; the tone is generated on
closure of the priority input
•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 (±8dB at 100Hz), treble (±8dB 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).
