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Hello! I want to install sonos in ceiling speakers. I only have 23cm between studs. It should just fint. But i see that i only will be avle to use 2 out of 4 clamps/locking skrews. Will that be enough or is this not possible in My ceiling..?

If they’re the in ceiling speakers sold through the Sonos website, you may want to check with the manufacturer themselves, a company named Sonance. Sonos doesn’t actually make in ceiling speakers. 


Agree with Bruce that you should check with the manufacturer.    That said, I bet it would likely hold  with 2 clamps across from each other, but perhaps a bit loose.   I have seen cases where the installer put a notch in the joist to give the extra space needed.


Thanks! And i hope that if i screw the two other clamps carefully againts the studs they will give some sort of grip..

I have bedrooms above. Will a backbox of 15l or 25l be good?