CPA240 Configurable Power Amplifier
Page 9 of 35
21031 CPA240 manual V1.31.doc
2.3 Brief Description
The CPA240 power amplifier provides up to four channels of amplification for both public
address and voice alarm applications.
The 100-volt line output stages are robustly designed and are protected against open circuits
and loads that exceed the channel’s rated power, including short circuits.
A thermal shutdown circuit provides further protection of the amplifier’s output stages.
The amplifier is equipped with a number of features that reduce system engineering and
assembly times.
An amplifier audio bus replaces previously hand-wired input cabling with a sixteen ‘zone’ or
‘destination’ ribbon cable.
A link matrix located within the amplifier allows the selection of a single ‘zone/destination’ from
the ribbon bus to each amplifier channel i.e. an amplifier channel may be configured to any one
output of the switching matrix.
Where the ribbon bus cannot be used due to special wiring requirements the auxiliary port ‘D’
type connector allows solder type connection to be made.
Selector switches within the amplifier chassis set the master or slave configuration of each
channel amplifier providing a range of power settings:
•
4 x 60 Watt
•
1 x 120 Watt & 2 x 60 Watt
•
2 x 120 Watt
•
1 x 180 Watt & 1 x 60 Watt
•
1 x 240 Watt
Paralleling amplifier chassis is achieved by connecting the parallel output on the auxiliary port to
the slave amplifiers. The volume control of the ‘master’ amplifier overrides the volume controls
of the paralleled slaves.
