Operation; General Installation; Front Panel - ADS 3120 Plus Operation Manual

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. 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 screen connector is used.

ALWAYS use a balanced or floating low impedance microphone on long
microphone runs, terminating in a balanced input.

Front Panel

1 2
1 OVERLOAD LED INDICATOR
2
3
4
5
6
3 4 5
MIC 1
MIC 2
MIC 3 / AUX 1
MIC 4 / AUX 2
MIC 5 / AUX 3
Page 7 of 16
6 7 8
7 BASS CONTROL
8 TREBLE CONTROL
9 MASTER GAIN
10 POWER LED
11 POWER ON/OFF SWITCH
9 10 11