Toggle between amps

Interesting question for y’all…

I am building a pretty nice listening set-up based around Ojas speakers and a single ended triode amp. No pre-amp because I my source is 2 Technics mk7’s running through a Mastersounds analog rotary mixer. This is all working really great for my listening room. 

Previous to this, I was running a single turntable to a sonos 5 (with a pro ject phono pre in between). This allowed me to play that source through the entire house because I have sonos throughout.

So - here’s the question… I’m trying to figure out how to create a way to easily toggle my mixer’s output to either my SET amp for the listening room or to the sonos > whole house. Like some kind of switch I guess.

any suggestions appreciated.