Manual

ENGLISH

CONNECTIONS

To prevent the risk of electric shock, do not connect the speaker with

the ampliﬁer switched on.

Before using the speaker, carefully check that all the connections have been

made correctly to make sure there are no accidental short circuits that

could cause electrical sparks. The speaker can be connected to constant

voltage audio lines at 70 V or 100 V.

1. Turn the rotary switch (Fig. 2 “next page”) and select the voltage of the

line and the power to be delivered.

2. Connect the black conductor of the speaker to the “negative” (-) of the

audio line, that leads from the ampliﬁer terminal marked -, 0 or COM tap

of the ampliﬁer

3. Connect the other conductor of the speaker to the “positive” (+)

conductor of the audio line.

VERY IMPORTANT:

To prevent speaker damage, never use the maximum

power at 70 V conductor when the speaker or the ampliﬁer is supplied with

100 V lines.

4. When making the connections, keep the following indications in mind

(Fig. 3 “next page”).

• The input voltage selected on the speaker must correspond with the

voltage selected on the ampliﬁer.

• The sum of the operating power values of all the speakers connected

to the audio line must not exceed that of the ampliﬁer.

• To ensure correct audio reproduction, the connections should be made

“in phase”, where the +/- polarities of the ampliﬁer output correspond

with the +/- polarities of the speaker input.

When two speakers reproduce the same frequencies but with phase

differences, these frequencies may be annulled. In sound systems, speakers

are often situated in adjacent positions and the sound waves produced

interact with each other. If a speaker is connected incorrectly; i.e. the

polarity of the audio line conductors is inverted, the audio signals are

transmitted with differences in phase and correct reproduction is therefore

jeopardized.