All VA-2060 and VA-4030 series amplifiers support Channel-to-Channel Failover. This is configured in the Vocia Software in the amplifiers Option Setting as 1:1 Channel. In this configuration, channel pairs can be specified and adjacent channels will act as a redundant backup. Channel 2 will act as backup for Channel 1, and for VA-4030 series amplifiers, Channel 4 will act as backup for Channel 3. When configuring 1:1 Channel Failover, the amplifier channel Load Selection switches of the primary and redundant channels must be set to use the same output Impedance.
Additionally, the VA-4030 series amplifiers support 3:1 Channel redundancy. This is configured in the Vocia Software in the amplifiers Options tab as 3:1 Channel. In this configuration Channel 4 will act as a redundant backup for Channel 1, 2 or 3. When configuring 3:1 Channel Failover, the amplifier channel Load Selection switches of all amplifier channels must be set to use the same output Impedance.
1:1 or 3:1 Channel Failover is triggered by one of the following conditions:
Heatsink fault (over temperature)
Short Circuit
Channel Failure
ELD-1 / Speaker Line fault (if enabled)
The redundant channel may be wired in parallel to the existing speaker line or connected to a redundant speaker line. The primary amplifier module will resume control after the fault condition is cleared and the unit is re-powered.
Example of speaker wiring for 1:1 Failover;
