Dual source power amplifier with auto source switching. It features two audio line inputs with a loop out to another zone, receiver or device from Line 2 source. This amplifier can be used for power upgrades in specific zones, for speaker selector or volume control systems. Built for multi-speaker applications with volume controls. Automatic switching between two sources with signal sensing. Front panel volume and balance controls. Channels are bridgeable to create one channel with 160 watts of power.