Currently the ONE only supports WiFi/UPnP compliant speakers that act as a Digital Music Player (DMP). These speakers must be able to actively access ("pull") music on a Digital Music Server (DMS) like the ONE, and are not merely a Digital Music Renderer (DMR), which requires music to be "pushed" to from the DMS. Please also see Wikipedia for more information about the definition of DMR, DMS and DMP.
We will be implementing Bluetooth audio output as well
Here is a useful workaround from one of our power users (thanks Peter): While the ONE can't support that speaker directly, you may want to try a wireless adapter out of the ONE and a receiver on you speaker into the MP3 input something like: http://www.amazon.com/gp/product/B00E953OJQ?ie=UTF8&camp=213733&creative=393177&creativeASIN=B00E953OJQ&linkCode=shr&tag=peterandlinds-20&linkId=L7RGV77AK6E3E2HX&qid=1414114389&sr=8-1. That should let you control your music from the ONE and hear it on the wireless speaker remotely.