www.cleveracoustics.co.uk
BGS 20T Series Loudspeakers
User Manual
5
Installation instructions & setup
Important installation advice
100V examples:
8Ω examples:
Standard 100V line
Standard 2 loudspeaker setup
Parallel 4 loudspeaker setup
Series parallel 4 loudspeaker mono setup
Multi-tap 100V line
• All loudspeakers have to be
connected to the constant voltage
line and wired in parallel.
• The output power is adjustable
using the switch provided on the
rear of the speaker.
• As the voltage on the line can
approach 100V, installation must
follow the best practice with double
insulated cable being used.
Cable runs should be kept away
from any potential source of
interference such as 3 phase mains,
data cables, telecom cables etc.
• 100V line systems must always be
wired in parallel and the total load
presented to the amplifier must
not exceed the rated output of the
amplifier or damage can result.
• You must NEVER mix 100V line
and low impedance speakers on
the same system.
• DO NOT run microphone cables
near mains, data, telephone or
100V line cables.
• DO NOT exceed 90% of the amplifiers
output power when using 100V line
(speech only).
• DO NOT exceed 70% of the amplifiers
output power when using 100V line
(high level background music only).
• ENSURE that all loudspeakers
are in-phase.
• ENSURE that there are no short
circuits on the loudspeaker line
before connection of the amplifier.
• Where it is intended to use multiple
low impedance speakers to cover an
area, the speakers must be wired in
a series/parallel arrangement in such
a way as to present the correct load
to the amplifier.
• Note: The total load impedance
presented to the amplifier must
never be below the rated amplifier
impedance, otherwise damage
can result.
4 x 20W - 80W load
20 + 10 + 10 + 2 + 2 + 4 = 48W load
20W
10W
10W
2W
2W
4W
100W
Amplifier
20W
20W
20W
20W
100W
Amplifier
Amplifier
8Ω
+
_
+
_
8Ω
8Ω
8Ω
Amplifier
8Ω
+
_
+
_
4Ω
8Ω
4Ω
8Ω
+
_
+
_
8Ω
4Ω combined load
4Ω combined load
Amplifier
+
_
8Ω
+
_
8Ω
+
_
8Ω
+
_
8Ω
+
_
8Ω
