ADS ADS120DF Original operating instructions

Installation &
Operation Guide
ADS120DF
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 Audio Design Services Ltd.
Audio Design Services Ltd, St David’s House, Adcroft St, Higher Hillgate, Stockport, Cheshire SK1 3HW,UK.
TEL: [phone] FAX: [phone]. WEB: www.ads-worldwide.net
© 2018

Public Address System Digital Mixer Amplifier
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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.
UNPACKING
While all Audio Design Services equipment is carefully packed to prevent damage in
transit, we recommend that the equipment is unpacked and inspected immediately
on receipt. If damage has occurred please advise your carrier and your supplier who
will arrange appropriate action.
If it is necessary to re-pack the equipment for onward shipping or returning to Audio
Design Services for service PLEASE ENSURE THAT THE ORIGINAL PACKING
OR EQUIVALENT IS USED.

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1. Product Description
1.1 Introduction
ADS120DF is a small digital mixer amplifier, which is cost-effective. It is applicable to small
broadcast system, small supermarket for background music and classroom for public
address.
1.2 Features
 With fire alarm mute function. When there is an alarm signal, all other inputs will be
muted except for MIC1.
 With signal level indicator (SIG), clipping indicator (CLIP) and protection indicator
(PRO).
 2 MIC IN, 1 channel with phantom power, and 1 channel with priority.
 2 LINE IN, 1 channel with RCA, and 1 channel with XLR.
 With 2 outputs, 1-channel 100V constant-voltage amplifier output, and 1 channel
1VRMS AUX OUT.
 With overload, short-circuit, and temperature protection function, and with
temperature-controlled fan.
 With master volume control; independent volume control for MIC and LINE; treble
and bass volume control.

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2. Appearance Description
2.1 Front Panel
1. MIC1 Emergency MIC IN
MIC1 has the priority, not affected by FIRE MUTE.
2. MIC1 VOL.
Adjust the volume of MIC1, clockwise for VOL+, counterclockwise for VOL-.
3. MIC2/AUX1 VOL.
Adjust the volume of MIC2/AUX1, clockwise for VOL+, counterclockwise for VOL-.
4. AUX2 VOL.
Adjust the volume of AUX2, clockwise for VOL+, counterclockwise for VOL-.
5. BASS
On the basis of central location, clockwise for BASS+, counterclockwise for BASS-.
6. TREBLE
On the basis of central location, clockwise for TREBLE+, counterclockwise for TREBLE-.
7. MASTER VOL.
Adjust electrical level of all signals, clockwise for VOL+, counterclockwise for VOL-.
8. POWER
9. LEDs

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2.2 Rear panel
1. Power Input Jack
~220V-240V/50-60Hz power supply.
2. Speaker Output
3. 70V/100V Constant Voltage Output Terminal
Connect 100V line to 100V and Com. 70V line to 70V and Com.
4. AUX OUT
5. AUX1 IN
6. AUX2 IN
7. Audio Source Selection (AUX2-MIC2)
AUX2 and MIC2, select AUX2 or MIC2 by left or right slide.
8. MIC2 IN
9. MIC2 GAIN
10. FIRE MUTE
The port is only used to connect dry contact of the relay. No input voltage or ground
connection is allowed! A closing contact will mute all inputs except Mic 1.

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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. All internal servicing should be performed
by a competent and qualified engineer.
 DO NOT expose the unit to rain or moisture. If any fluids or foreign objects
should enter the unit, disconnect the power plug immediately.
 DO NOT site the equipment in locations exposed to direct sunlight, near
heaters or other heat sources. Avoid locations with high humidity or dust levels.
 DO NOT obstruct the ventilation slots in the amplifier case and allow adequate
ventilation. (Ensure that a 1U ventilation panel is fitted above the unit if the
amplifier is rack mounted.)
 DO NOT run microphone cables near mains, data, telephone or 100V lines.
 AVOID jointing the microphone cables if possible. If this is unavoidable, make
sure a good quality screened connector is used.
 ALWAYS use a balanced or floating low impedance microphone on long
microphone runs, terminating in a balanced input.

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Specification
Model ADS120DF
Rated Output Power 120W (Note: Please use a constant-voltage speaker within
the power range)
Rated Output Voltage 100V
Sensitivity MIC1 IN 0.005(±1mV)
MIC2 IN 0.006(±1mV)
LINE1 IN,LINE2 IN,
PRIORITY IN
0.3(±20mV)VRMS
PRIORITY IN-100V 100 VRMS
SNR MIC1, MIC2, LINE1 IN ≥74db(MAX.)
LINE2 IN,INPUT ≥80dB(MAX.)
Frequency Range 80Hz-15kHz (±3dB)
THD ≤0.5% (1K under normal working condition)
Working Voltage AC230V/50Hz
Tone Bass ±10dB (100Hz)
Treble ±10dB (10kHz)
Rated Power Consumption 150W
Package Dimensions (L×W×H) 310×275×120mm
Machine Dimensions (L×W×H) 200×190×44mm
Net Weight 1.5kg
Gross Weight 2kg
The specification will be subject to changes without prior notice.
Packing List
No. List Quantity
1 ADS120DF 1 piece
2 User Manual 1 copy
5 1.8m Power Cord 1 piece
6 2P Green Plug 2 pieces
7 1500MM Audio Cable 1 piece

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WARRANTY CONDITIONS
Audio Design Services Limited warrants that this product is free from defects in materials and workmanship for
the period of one year from the date of purchase. If this product is defective, Audio Design Services Limited
agrees to repair or replace it, free of charge, subject to the following:
 The defect becomes apparent during unpacking or normal use
 The product has not been subjected to misuse, abuse, neglect, accident, incorrect
wiring, improper installation or improper use
 The product is intact and has not been tampered with, opened, altered, or repaired by
unauthorized personnel
 The product is delivered through the dealer or by the purchaser to Audio Design
Services Ltd with all transportation charges prepaid, within one (1) year of date of
sale
 Audio Design Services Ltd personnel examine and judge that the product is defective.
If it is judged to be defective, Audio Design Services Ltd will, at their discretion, repair
or replace the product with new or reconditioned parts or a product of the same or
similar design
When returning this product, please contact Audio Design Services Ltd to obtain a returns number
which should be marked on any packages to be returned. Please include your name, address,
telephone number, a description of the problem and your sales receipt.
This warranty is in lieu of all other warranties expressed or implied and no one is authorised to
assume any liability on behalf of Audio Design Services Ltd or impose any obligation on it in
connection with the sale of any product other than as outlined above.
Audio Design Services Ltd
St David’s House
Adcroft Street
Higher Hillgate
STOCKPORT
SK1 3HW
UK
Telephone: [phone]
Email: [e-mail]
Web: audiodesignservices.co.uk