Specifications

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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
o a ‘universal’ input allowing simple configuration via a slide switch
o a switch-selectable, 18Vdc 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 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).