The "CEE 7/16 - C7 (1.50 m)" cable from Goobay is compatible for powering an Apple TV 4K. The Apple TV 4K uses a standard C7 power cable, identified by the '8' plug. This type of cable corresponds exactly to the specifications of the Goobay cable you mentioned.

The "CEE 7/16 - C7 (1.50 m)" cable from Goobay is compatible with the Sonos Play:1. It has the required CEE 7/16 plugs and sockets that are suitable for connection to the Sonos Play:1.

The Goobay CEE 7/16 - C7 (1.50 m) power cable has not been developed specifically for the Sonos One. The Sonos One requires a standard power cable with an IEC C7 plug, which is what the Goobay cable offers. However, you should ensure that the specifications of the cable meet the requirements of the Sonos One, especially in terms of performance and safety standards. In general, C7 cables are compatible with devices that use a C7 connector, but it is always advisable to check the specific requirements of the device to ensure safe and optimal use.