Schneider Electric 560125D/2 - Manual (Page 11)

Multi Room Audio Amplifier Installation Instructions
11
3 Wiring Details
Use high quality cables and connectors for best results. Make sure that all
connections are tight and that no strands of wire are protruding from the
connectors. Bootlace crimps are recommended for twisted network cable
connections.
3.1 Speaker Connections
The high power MRA amplifiers use spring-type connectors. The Low Power
Remote Amplifier uses a screw-type connector.
Use low-impedance, stranded speaker cable to connect the loudspeakers to the
output terminals on the amplifier. The impedance of the cables should not exceed
5% of the impedance of the speakers. As a general rule, the larger the diameter of
the speaker cable's conductors, the lower the impedance.
Cautions
Avoid damage to the equipment by observing these cautions.
• Do not allow the positive and negative speaker wires to short together.
• Do not make any connection between speakers connected to different
amplifiers.
• Do not connect any speaker wires to earth (ground).
Observe the positive (+) and negative (-) markings on the amplifier and make sure
that you consistently connect the cables to the speakers throughout the installation.
If speaker wire polarity is wrong, sound quality will be poor due to out-of-phase
sound from the various speakers.
Figure 3. Amplifier loudspeaker terminals
In certain cases, you can connect multiple speakers to each channel of the amplifier
by following the speaker manufacturer's recommendations.