Just a note for those searching for issues related to using an external speaker with an SP3. Don’t bother as of March 2015. Seems that this combination is not tested so it is not explicitly supported… and I can tell you doesn’t work.
We’ve tried using the headphone jack and we’ve tried a USB speaker – none work with the remote party. I have not (yet) tried a Yeti microphone… will try that today.
I have talked to WebEx support (as in my ticket generated a human tech who called me) and they didn’t spin it – they don’t’ know when explicit support will be added. They did suggest talking to my account rep as “another channel”. I understand this as we work with our account reps and sales team all the time in our development and support efforts.
While I didn’t like what I was told – I appreciate the call and I appreciate the honest sharing of the few facts they have.