On our Promethean
Knowledgebase will be connection guides for each our models of ActivBoards
with built-in speakers:
Article 10746 will illustrate the connections on the back of
a 100, 300, or Pro Series ActivBoard, while Article 10704 will do the same for
500 series ActivBoards.
If the connections are set up as illustrated in those
articles, Article 10436 will advise you on how to set up the computer to have
the audio output over the USB connection to the board in use.
(Support Case 00580295)