Audix SMU1 Bedienungsanleitung PDF herunterladen (Seite 14)

Audix Systems,

Station Road,

Wenden,

Saffron Walden,

Essex,

CB11 4LG.

Telephone: +44(0)1799 540888

Facsimile: +44(0)1799 541618

Page 14 of 25

PA-VA Application Guide

Small zones which do not require dual speaker lines (such as Lifts) will use a single 60W

PowerBloc driving a single speaker line (figure ?a)

Larger zones requiring dual speaker lines but with less than 120W total power required will

have dual redundant speaker lines each driven by one 60W PowerBloc amplifier (figure ?b).

Therefore, if one PowerBloc fails the sound coverage in the affected zones will reduce but will

not be lost.

Large zones requiring dual speaker lines but with more than 120W total power required will

have dual redundant speaker lines each driven by multiples of 60W PowerBloc amplifiers in

parallel (figure ?c). Therefore, if one PowerBloc fails the power into one speaker circuit will be

reduced (but not lost) and the sound coverage in the affected zones will be slightly reduce.

Using the latest MOSFET circuit techniques results in an efficient and extremely reliable

power amplifier. The amplifiers are protected from short circuit speaker lines by current

limiting on the output stage. Also the amplifiers are protected from persistently being over-

driven by a thermal cut-out which is triggered at 85 °C this reduces the amplifier input drive to

reduce the transistor load.

The output power of existing units can be increased at any time by the addition of more

PowerBloc output modules (subject to available space in the mainframe).

The use of parallel reliable amplifiers to drive each zone negates the need for hot or cold

standby spare amplifiers as the system will remain available under the failure of one

PowerBloc.

For more information on amplifiers please refer to User Manual Ref 21015

The following standard amplifier configurations can be utilised;

Monitored Non-monitored

1 X 120W POWER AMPLIFIER 570.001.024 570.001.010

2 X 120W POWER AMPLIFIER

570.001.013 570.001.020

1 X 120W + 1 X 60W POWER AMPLIFIERS

570.001.022 570.001.018

1 X 120W + 2 X 60W POWER AMPLIFIERS

570.001.023 570.001.019

1 X 180W POWER AMPLIFIER

570.001.014 570.001.011

1 X 180W + 1 X 60W POWER AMPLIFIERS

570.001.025 570.001.012

1 X 240W POWER AMPLIFIER

570.001.001 570.001.003

1 X 60W POWER AMPLIFIER

570.001.026 570.001.009

2 X 60W POWER AMPLIFIER

570.001.015 570.001.021

3 X 60W POWER AMPLIFIER

570.001.027 570.001.017

4 X 60W POWER AMPLIFIER

570.001.002 570.001.004

6 Fault Monitoring

Audix offers the opportunity to monitor the audio path of public address and voice alarm

systems.

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