AVSL Sound & Light Product Guide 2024 - Catalog - Page 164
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TECHNICAL DATA | TYPES OF SYSTEM | 100V LINE SPEAKERS
100V Line Speakers
For many applications, it is necessary to drive many speakers
with a single ampli昀椀er, giving greater coverage to multiple rooms
or over a given area. Constant voltage systems (usually 100V
line) employ a transformer in the ampli昀椀er to convert the output
to high impedance and a corresponding transformer in each
speaker to tap off the required power from the ampli昀椀er.
Theoretically, this allows a large number of speakers to be driven
by one ampli昀椀er, so long as the overall power being tapped by
the speakers is within the ampli昀椀er’s output capacity (usually
90% of the ampli昀椀er’s maximum rated output).
Standard 100V line set-up
Total tapped power: 80W
20W
100W
Amplifier
In addition, the transformers in each speaker may have tappings
at different points along the primary coil, which effectively
draw different Wattages from the ampli昀椀er. For example, a 10W
speaker may also have settings for 5W or 2.5W.
20W
20W
20W
The speaker output may also be varied using remote volume
controls, known as attenuators, but these should be considered
to be at their maximum volume output when choosing
an ampli昀椀er to drive the speakers.
100V line set-up with multiple tappings
Wired in parallel and tapped to 90% of the ampli昀椀ers max. power output
100W
Amplifier
15W
Attenuator
0 - 20W
20W
Attenuator
0 - 20W
10W
5W
20Wmax. + 15W + 20Wmax. + 5W + 20W + 10W = 90W
If more speakers are required beyond 90% of the
100V ampli昀椀er’s maximum output, a slave ampli昀椀er
may be employed to drive these.
The slave ampli昀椀er is simply linked from the line output
of the main ampli昀椀er, to which another series of
speakers are then linked to, in the same way the
speaker are from the main ampli昀椀er.
Extended 100V line set-up
Main 4 speaker system with
additional 4 speaker set
and slave ampli昀椀er
Line input
Line output
MAIN
100W
Amplifier
20W
20W
20W
20W
20W
20W
20W
20W
SLAVE
100W
Amplifier
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