Or better yet, is there a way for all speakers in a room to "register" on one device?

I've got a Hub in my kitchen that we use regularly for timers, but it's not quite loud enough to fill the room with audio, so we brought another mini into the room.

Problem being, even with the sensitivity on the mini set to minimum, it still sometimes picks up our requests. Instead of displaying timers on the Hub, it'll silently keep time.

I'd like the mini to either not answer entirely, or relegate all "visual" responses to the hub.

Right now it's become such a pain that we've simply removed that extra speaker entirely, but I'd like a solution if it's somehow available. I tried to do a search, but I haven't come up with anything and can't figure out a way to narrow it down.

Edit: I'm an idiot. Mute switch will work just fine. Although best case would have been a way to keep it on and "move" all responses to the Hub, but this will work. Sorry everyone.