First of all do you have a Gen1 Connect: Amp or a Gen1 Connect?  Also, what is a 6.5 Sonos in ceiling speaker?

I have the Connect: Amp.

TYVM

Sonos has passive speakers that are mounted in walls and ceiling.  I was using the connect amps to power off brand passive speakers in my ceiling.  We are moving and not taking the speakers, just the connect amps.  

I noticed that the  Sonos speakers said they were wireless and wondered if the connected to the connect amp wirelessly or if I will need to connect via traditional cables.

Thanks for the clarification. Sonos in-ceiling speakers must be wired to the amp. They are wireless in the sense that they can sync with other Sonos speakers for music.

However, the Connent:Amp Gen1 is before my time using Sonos. That said I’m not positive that the current Sonos in-ceilings speakers will work with that vintage amp. Maybe someone else in the community can chime in on the compatibility aspect. 

They should work, not sure if they would Trueplay or not on an S1 system.

Thank you!