Installation & Operation Guide ADS 3120 Plus 120W ac/dc Mixer Amplifier PLEASE NOTE: THIS MANUAL AND THE NOTES CONTAINED HEREIN ARE COPYRIGHT AND MAY NOT BE REPRODUCED EITHER WHOLLY OR IN PART, IN ANY WAY WHATSOEVER, WITHOUT WRITTEN CONSENT OF ADSworldwide. Audio Design Services Ltd, St David’s House, Adcroft St, Higher Hillgate, Stockport, Cheshire SK1 3HW, UK. TEL: +44 (0)161 666 6363 FAX: +44 (0)161 666 6366. WEB: www.ads-worldwide.
Product Compliance to EC directives for Standard Products All standard products conform to the relevant directives, regulations and standards for electronic and associated apparatus. The equipment is CE marked both on the apparatus and the packaging. Our products meet the appropriate British and International standards. A product ‘Declaration of Conformity’ Statement is available for each of the product ranges (available on request). This covers both the EMC and Low Voltage Directives.
IMPORTANT The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of un-insulated dangerous voltage within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation mark within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance instructions in the literature accompanying the appliance.
TABLE OF CONTENTS INTRODUCTION .................................................................................................... 5 Features .............................................................................................................................. 5 Safety Information............................................................................................................... 5 OPERATION .................................................................................................
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.
If a 13-amp (BS1363) plug or other type of plug is used, a 5-amp fuse must be fitted either in the plug or at the distribution board. Green/Yellow Earth Brown Live Blue Neutral Fuse (max 5A) Fuse Holder IEC Mains Inlet Socket 13A Mains Plug Wiring (UK) For mains connection other than in the UK, refer to your local requirements for connection to the mains supply.
Audio Design Services Ltd., St David’s House, Adcroft Street, Higher Hillgate, STOCKPORT SK1 3HW. OPERATION General Installation ALWAYS ensure that the equipment is properly earthed (grounded). Operating without an earth is dangerous and may cause high levels of audible hum from the speaker outputs. NEVER remove the top cover of the amplifier or make an internal adjustment with the ac mains supply connected.
28 Rear Panel 27 26 12 13 14 15 16 17 18 19 20 21 22 12 MAINS SOCKET 13 DC IN TERMINALS 14 LOUDSPEAKER TERMINALS 15 BOOSTER OUT (VARIABLE) 16 BOOSTER OUT (FIXED OR VARIABLE) 17 AUX 3 18 MIC 5 19 AUX 2 20 MIC 4 21 AUX 1 22 MIC 3 23 MIC 2 24 MIC 1 25 MIC 1 Priority Connection 26 MIC 2 Priority Connection 27 MIC 1 Trim Control 28 MIC 2 Trim Control 25 23 24 Priority Connections MIC 1 and MIC 2 Pin 1 2 3 4 5 Signal + Ground Signal Access Access Function Positive si
Input Connections MIC 1 and MIC 2 Microphone inputs 1 and 2 use an XLR / ¼” 3-pole jack combination socket and a 180˚ 5-pin DIN socket. Any of these connectors may be used. However if priority is required it may be easier to use the DIN socket and compatible ADS Signet microphone. (See Priority Connections 25 and 26 and wiring table on Page 8 for the DIN socket.
All inputs are configured as AUX inputs. To configure them as balanced microphone inputs proceed as follows disconnect the power supply then remove the amplifier top cover locate the correct switch on the rear PCB (MIC 4 is the centre one and MIC 5 the right hand one when viewed from the front of the amplifier) set the switch to the position nearest to the front panel replace the amplifier top cover.
Booster Output Variable Output Where a variable output is required this is available through the 5-pin DIN output socket (see Rear Panel No.16 on Page 8). The output is dependent on all controls. Pin 1 2 3 4 5 Function Variable output. Screen. Open collector to ground when a priority signal is present. Fixed output. Ground. 180o 5-pin DIN socket Variable Output Two phono sockets are available (see Rear Panel No.15 on Page 8).
Accessories 1 x Instruction Manual 1 x Mains Supply Lead 1 x 19-inch Rack Mounting Kit Some Possible Interfaces 100V line out to loudspeakers Booster Amplifier 24V battery dc IN CD Player Tuner AUX3 AUX1 Modules can use any AUX input (unless the shared MIC is in use) Page 12 of 16 Radio Mic Paging Receiver Microphones Microphones can use any MIC input (unless the shared AUX is in use)
Audio Design Services Ltd., St David’s House, Adcroft Street, Higher Hillgate, STOCKPORT SK1 3HW. TROUBLESHOOTING Symptom ac power LED does not light Sound output is very low Sound output is low and distorted. Amplifier gets very hot. Possible Cause No ac power Remedy Ensure that the supply cable is correctly connected to the mains outlet and the supply is turned on. Amplifier is off Switch on amplifier by pressing the on/off switch.
Audio Design Services Ltd., St David’s House, Adcroft Street, Higher Hillgate, STOCKPORT SK1 3HW.
NOTES Reference Note Page 15 of 16
Audio Design Services Ltd., St David’s House, Adcroft Street, Higher Hillgate, STOCKPORT SK1 3HW. WARRANTY CONDITIONS Audio Design Services Limited warrants that this product is free from defects in material and workmanship for the period of one year from the date of purchase.
