ENGLISH
Connect the line positive wire (coming from the amplifier output
usually marked ‘100 V’, ‘+’ or ‘a’) to the ‘+’ loudspeaker terminal.
Connect the line negative wire (coming from the amplifier output
usually marked ‘0’, ‘-’, ‘COM’ or ‘b’) to the ‘-’ loudspeaker terminal.
(picture 9)
NOTES ABOUT CONSTANT VOLTAGE SYSTEMS
The loudspeaker input voltage (Vd) shall correspond to the amplifier output voltage (Va).
The sum of nominal power values (Pd x n) of all loudspeakers connected to the line shall not
exceed the amplifier power (Pa).
Make sure all loudspeakers are connected in phase to ensure a correct sound reproduction.
NOTES ABOUT LOW IMPEDANCE CONNECTIONS
The total loudspeaker impedance must not be lower than the amplifier output impedance.
Note: a loudspeaker total impedance equal to the amplifier output one permits to get the
maximum deliverable power (but an higher loudspeaker impedance entails less power).
The total loudspeaker power shall be adequate for the maximum deliverable power of the
amplifier.
The loudspeaker line shall be as short as possible (for long distances, it may be necessary to
use cables with large cross-section wires).
NOTE ABOUT CABLES
Always use cables having wires with an adequate cross-section, considering the cable length
and the total loudspeaker power.
Loudspeaker lines must be kept separated from mains cable, microphone cables or others, in
order to avoid inductive phenomena may cause hum or noises.
Use loudspeaker cables having twisted wires to reduce hum caused by inductive effects due
to coupling with electromagnetic fields.
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Pa =
Amplifier power
Pd =
Speaker power
n =
Number of speakers
Vd =
Speaker input voltage
Va =
Amplifier output voltage
