Because of the non-licensed nature of wireless speakers to comply with Part 15, 
you'll never find any with that kind of range.

They claim 300 feet, but that is about three times the usable range that I've 
seen.
----- Original Message ----- 
From: "Frederick" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, September 25, 2007 11:28 PM
Subject: off topic wireless speakers


Hi
     I am in a position where I need to locate some wireless speakers that
have a range of five hundred feet or a little more. I am trying to feed the
audio from a public address system in to the wireless speakers so the
speaker in the conference center can be heard in other locations around the
property. The location of these satellite speakers will need to change from
time to time. So, portability is a factor. Also, it needs to be on a
conservative budget.
     All ideas are appreciated!

God bless,
Mark
God loves you!
My ham radio lists.
http://lists.topica.com/lists/funhamradio.
http://groups.google.com/group/funhamradio-list
My personal website
http://funhamradio.bloki.com