MCMAUTOMATIC SPEAKER SWITCH, 200W, 12VDC

can this work as line-in audio switch with one chromecast audio (input 1) and one tv (input 2)

Does anyone know if there is a solid-state (non-mechanical relay) version of this type of switch to eliminate the "Click" when switching?

Is the power adapter rated to work on AC 110 and 220?

what do i need to connect my rear speaker wires to an amp?