Specifications

Multi Room Audio Matrix Switcher and System Installation Instructions
13
The orange C-Bus indicator LED shows the status of the C-Bus network at the unit.
If sufficient network voltage (20 V d.c. to 36 V d.c.) and a valid network clock are
present, the indicator stays lit. If the network voltage is marginal, the indicator
flashes.
Indicator Mode Meaning
Off No network clock is present and/or no
power is present.
On Power is on and C-Bus network clock is
present.
Flashing at 4Hz rate The C-Bus network power is marginal
(15 V d.c. < voltage < 20 V d.c.)
Table 5. C-Bus indicator meanings
2.4 Speakers
Depending on the installation, speakers may be mounted on a wall using brackets,
flush mounted in a wall or concealed in a ceiling. When you mount speakers on
brackets, you should install a wall plate with RCA jacks near each speaker. Always
use stainless steel mounting hardware for outdoor speaker installations.
Use stranded, pure copper speaker cable. Quality speaker cable has low electrical
impedance. The impedance of the cable should not exceed 5% of the impedance of
the speaker.
Example:
If the cable and speaker have an impedance of 0.001Ω/m and 8Ω respectively,
(5% of 8 ) ÷ (0.001 x 2 conductors) = 200,
then the cable should not exceed 200 metres in length.
The high power MRA amplifiers use spring type connectors. The Low Power
Remote Amplifier uses screw type connectors.
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.