Sonos amp: How to add an input to accommodate both a CD player and a Project T1 turntable

Hi, all!

This very happy -- but recently frustrated -- Sonos user could use your help.

My seemingly simple question: How can I effectively add an input for another device to my Sonos amp?

My Sonos amp now talks to my TV, a CD player, a pair of wired speakers, and a handful of wireless Sonos 5s throughout the house. This set-up allowed us to preserve beloved old-school elements (speakers and CDs) while letting us listen to music throughout the house without spidering wires everywhere --- and it works beautifully!

Then we decided to add a turntable to the mix --- and that’s where things got sorta complicated.

We bought a Pro-Ject T1 SB (the kind with a pre-amp). Like a dummy, I assumed we could just plug it into the Sonos amp, just like our CD player. But there isn’t another in-line port to accommodate it. Bummer!

Other than occasionally swapping the input RCA cables from the CD player to the turntable and visa versa (a clunky solution, but not the end of the world), does anyone have a suggestion for a kind of switch that I could plug into the Sonos amp that would effectively add another input?   

I found this device -- https://www.amazon.com/dp/B08HV6YRXR?ref=emc_p_m_5_i_atc -- from a company called Prozor. It looked like it would serve the purpose just fine. However, when I called Sonos to confirm, they said they had never tested their amp with a third-party switching device. So they sorta punted.

Any trusted solutions are very welcome --- and huge hanks for reading!

Cheers,

Brett