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Automatic Speaker A/B Source Switch
This switching device automatically selects between two stereo amplifiers to a single pair of speakers. It is perfect in situations where installed speakers are used with both a local stereo or home theater system, and a distributed audio system.
Default Input–A is selected when no signal is present. When a signal is sensed at Input–B, the selector automatically switches to that input. A separate 12VDC, 100mA signal is also provided to trigger other external devices.