There is another way to connect to your Stockwell - the old fashioned way, using a double-ended cord and the 3.5 mm input.
Use a double-ended cord with 3.5 mm plugs to connect to audio source that have audio output such as a mobile telephone, iPhone / iPad / iPod , Mp3 Player, or Airport Express
1. Connect the cord with the 3.5 mm stereo plug to the input on the Stockwell
2. Connect the cord with the 3.5 mm stereo plug to the music player
3. Select the input as source by pushing the Source button until the input indicator is lit