Got an Apple Homepod?
As long as you have an Apple Music subscription you'll be able to listen to us either by searching for your desired stations name or by asking Siri to play a Station, for example "Hey Siri, play Magic Radio".
Linking your premium account to Apple Speakers
Unfortunately Apple speaker devices do not have a skill that supports ad-free streams and Premium only stations. However, you can AirPlay from mobile apps to get access. Check out here how to get this working: Using Chromecast or Airplay