Constant Voltage Systems; Constant Impedance - Advanced Native Technologies BBM BP/WP series Handbuch

4 | CONNECTIONS
For the installation of the speaker and to guarantee its proper operation, strictly apply
the instructions below:
• It is recommended to contact qualified personnel, i.e. personnel with sufficient technical
knowledge, experience or specific instructions, able of properly making the connections
and preventing the dangers of electricity. The entire sound system must be made in
compliance with existing standards and laws concerning electrical systems.
• To avoid the risk of electric shock, connect the speaker with the amplification system
turned off.
• Before operating the speaker, carefully check the correct connection to avoid accidental
short circuits that can cause electric sparks. The speaker can be connected to 70V
or 100V constant voltage (high impedance) or 8 Ohm constant impedance (low
impedance) audio lines.
Make the connections using the White
(+) and Black (-) wires in the back of the
speaker. (Fig.1)

4.1 | CONSTANT VOLTAGE SYSTEMS

The input voltage of the speaker must match the voltage selected on the amplifier, and
the sum of the power of all the speakers connected to the audio line must not exceed
the nominal power of the amplifier.
Make the connections taking into consideration the following indications:
• Use cables of adequate section. A greater distance between the amplifier and the
speakers requires larger section cables. This avoids signal losses due to line length.
• To prevent inductive phenomena from causing buzzing and disturbs, and
compromising the proper functioning of the system, the connection cables must
BBM BP/WP Series
6 User manual |
Fig.1
B
A
COM - Black (-)
A
70V/100V/8Ω - White (+)
B
(Fig.2)
not be placed in the same cable duct or close to devices producing strong
magnetic fields (e.g. power transformers), conductors of electricity and
lines that power speakers. Furthermore, to minimize the inductive effects
due to coupling with electric fields, use cables with twisted conductors.
• To ensure correct sound reproduction it is necessary to connect the
speakers "in phase". I. e. the positive and negative polarities of the amplifier
must correspond to the positive (70-100V) and negative (COM) polarity
of the speaker input.
• To simplify the connection, it is possible to use bipolar cables with a
marking (e.g. different colors) which distinguishes the polarity.
Amplifier
BBA 240
70V-100V 70V-100V
COM
Fig.2
4.2 | CONSTANT IMPEDANCE SYSTEMS
The total load impedance of all the speakers must be higher than nominal
impedance of the amplifier and the length of the connection cables must
be reduced to the minimum.
8 8
8 8
8 8
8 8
COM COM
COM COM
8 8
8 8
COM COM
COM COM
COM COM
COM COM
Fig.3
COM 70V-100V COM
(Fig.3)
8 8 8 8
8 8 8 8
COM COM COM COM
COM COM COM COM
8 8 8 8
8 8 8 8
COM COM COM COM
COM COM COM COM
Fig.3
BBM BP/WP Series
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