The VA-8600 Failover Module is an optional module that can be used in the VA-8600 and VA-8600c amplifiers. It offers selectable 7:1 or dual 3:1 channel failover. This failover option adds to the device-to-device failover and 1:1 channel failover options already built into the VA-8600 and VA-8600c. Connection to achieve failover is straightforward using the provided harness. Not all channels need to be used, and it is acceptable to have less than 7 or 3 channels fitted. Since VFOM-1 and PARM-1 use the same optional slot #10, users can have either one of these capabilities in the VA-8600 or VA-8600c but not both within the same amplifier at the same time. EN 54-16 certified.