It would have been nice to have a similar option when using line - out, or alternatively be able to choose a type of speaker output with a voice command. (techradar.com)
Once you click on the play button provided there, both left, and right speaker output will be tested by playing a sample audio clip. (thewindowsclub.com)
The speakers themselves are in the tablet portion, the dock does not offer any extra speaker output. (notebookreview.com)