You could also get an FM transmitter off EBay or elsewhere and broadcast to an FM radio or stereo receiver. I use this approach on a daily basis.
I've tried a few different transmitters and the one I've found works the best for me in terms of broadcasting output allows for selection of up to 200 frequencies and has the four memory buttons below the screen.
The one that I have comes with a USB power cable and a detachable car connector so can power it without batteries from your computer or through a USB power source, adapter,... This USB capability is really handy.
This is like the one I have with USB powerability:
http://cgi.ebay.ca/WHITE-FM-Transmit...QQcmdZViewItem
There seem to be many suppliers carrying them and those from Hong Kong/China seem more powerful than those available in NA like the Belkin brand ones.
If you have the volume of the sound source on high and use a headphone extensioncord between the sound source and transmitter, you should get good transmission throughout your place; probably in to your backyard if you have a house. I often broadcast internet streams at home this way so that if listening to sports or talk, don't miss anything if going room to room if have a couple of radios turned on.