The Audioengine W3 Wireless Audio Adapter might just fit the bill for you if used with active/powered speakers @meiatflask. I purchased version 1 of this gizmo years ago and it worked quite well.
http://audioengineusa.com/Store/Wireless/W3-Wireless-Audio-Adapter
http://audioengineusa.com/Store/Wireless/W3-Wireless-Audio-Adapter