I purchased a new Sonos One 2nd gen last month, and I immediately noticed that the microphone was nowhere as sensitive as the gen 1 version. For Alexa to respond, I have to be quite near the Sonos One, and I've had to raise the volume of my voice to be heard.
I relocated from Europe earlier this year and was waiting for all my Sonos gear to arrive with my furnitures. Those have now arrived and I set it all up over the past few days.
So I have Sonos One devices in all bedrooms, all but one are 1st gen, the 2nd gen being in my bedroom.
When I say "Alexa, turn on the light", it's typically Alexa in another room that will respond. "Alexa set a timer for 5 minutes" and you can hear it being setup in another bedroom.
Now I don't know if it's an issue with this particular gen2 that is faulty, or that somehow the gen2 has a less sensitive microphone. But it's pretty much unusable as an Alexa device. If I say "Alexa!" with a rather low voice, I can hear the "ding" noise on all the other Sonos One but the gen2 that is closer to me.
Any ideas if that sensitivity can be adjusted?