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Sorry it is not possible. Sonos will give you a $100 voucher though for the CR100.
https://en.community.sonos.com/controllers-software-228995/save-the-cr100-6800510
https://en.community.sonos.com/controllers-software-228995/save-the-cr100-6800510
I hve 7 bricked CR100s. How can I contact the engineering department?
Sonos does not provide a way to unbrick. You are unfortunately SOL, no way to roll back.
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