Introduction; Features; Safety Information - ADS 3120 Plus Operation Manual

Audio Design Services Ltd., St David's House, Adcroft Street, Higher Hillgate, STOCKPORT SK1 3HW.

INTRODUCTION

Features

The ADS 3120 Plus is a 120 watt rms, two-zone, mixer amplifier suitable for powering
medium to large sound systems where music may be required in one area and quiet in the
rest of the building. Messages can be relayed to both areas using the priority switching
system.
Features include

220-240Vac at 50Hz or 24Vdc power operation

two balanced microphone inputs (MIC 1 and MIC 2) with priority paging & chime

three more balanced inputs switchable between microphone and line level

two outputs - one for speech and music, one for speech only
(this facility is only available on MIC 1 and MIC 2)

each input has phantom power facility

volume controls for all inputs, located on the front panel

separate bass, treble and master volume controls, located on the front panel

supplied with 19-inch rack mount ears.
Additional features on the new version (Plus) of the ADS 3120 include

XLR and ¼ inch 3-pole jack combination sockets for MIC 1, MIC 2 and MIC 3

5-pin DIN sockets for MIC 1 and MIC 2
(to accept microphones fitted with a 5-pin DIN plug – e.g. the ADS Signet 1A)

volume restoration

trim control on MIC 1 and MIC 2.

Safety Information

WARNING – THIS APPLIANCE MUST BE EARTHED
IMPORTANT
The wires in the mains lead are coloured in accordance with the following code
Green and yellow Earth (E); Blue: Neutral (N); Brown: Live (L).
As the colours of the wires in the mains lead of the apparatus may not correspond with the
coloured markings identifying the terminals in your plug proceed as follows

the wire coloured green and yellow must be connected to the terminal
marked by the letter E (or the safety earth symbol), or coloured green and
yellow

the wire coloured blue must be connected to the terminal marked with the
letter N or coloured black

the wire coloured brown must be connected to the terminal marked with the
letter L or coloured red.
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