jotron MPA 1603 GA User Manual

24
User and Installaon Manual
Compact MPA
5.2.7 AMPLIFIERS
The number of loudspeakers, their tapping (actual power output) and, in some cases, the zone segmentaon determines the
necessary number of ampliers in the amplier pool.
In a xed line level (100V) system such as the Compact MPA, the requirement for amplier power is exactly the same as the
loudspeaker output gure.
During planning of the Compact MPA GA / PA system installaon it is recommended to allow for 10 – 25 % headroom for
the amplier pool. This is to take account of any adjustments during installaon or as a result of subsequent changes to the
conguraon.
The 1671 power amplier delivers a maximum connuous power output of 250W. Note that if the 1671’s auxillary 24VDC
power output is used, the available audio power output is reduced to 220W.
Amplier requirement calculaon example. Amp 1’s 24VDC output is used, reducing its power output to 220W:
 #
6W loudsp.

#
15W loudsp.

Tot. W AMP:
Zone 1 (cabins & corridors) 20 1,5W 30W Amp 1: 220W
Zone 2 (crew accommodaon) 10 3W 4 7,5W 60W Amp 1: 220W
Zone 3 (working areas) 5 6W 3 15W 75W Amp 2: 250W
Zone 4 (engine room spaces) 6 15W 90W Amp 2: 250W
Zone 5 (outdoor spaces) 15 15W 225W Amp 3: 250W
Zone 6 (passenger spaces) 20 1,5W 4 7,5W 60W Amp 1: 220W
System B (idencal to A) #
6W loudsp.
(CAR 6T)
#
15W loudsp.
(HP15T)
Tot. W AMP:
Zone 1 (cabins & corridors) 20 1,5W 30W Amp 1: 220W
Zone 2 (crew accommodaon) 10 3W 4 7,5W 60W Amp 1: 220W
Zone 3 (working areas) 5 6W 3 15W 75W Amp 2: 250W
Zone 4 (engine room spaces) 6 15W 90W Amp 2: 250W
Zone 5 (outdoor spaces) 15 15W 225W Amp 3: 250W
Zone 6 (passenger spaces) 20 1,5W 4 7,5W 60W Amp 1: 220W
This example gives a reasonable safety margin for miscalculaon and/or headroom for future adjustment:
• Amp 1 : Derated to 220W, 150W load, 42 % Headroom
• Amp 2 : 225W load, 10 % Headroom
• Amp 3 : 225W load, 10 % Headroom
5.2.8 SHORT CIRCUIT PROOF LOUDSPEAKERS
A 100V line adapted loudspeaker equipped with a line transformer is regarded as a protecon against loudspeaker short
circuit and is required in all installaons (independent of type of vessel).

jotron MPA 1603 GA Specifications

General

Brand	jotron
Model	MPA 1603 GA
Category	Marine Equipment
Language	English