Phil Keller wrote:
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>=20
>   I am involved with a local volunteer group that puts on a Ghost House=20
> every Halloween.  It is setup in, and around, a historical house in the=20
> middle of a shopping center parking lot.  We would like to play sounds=20
> and music (HiFi not required but nice) throughout, but holes in walls=20
> and ceilings for speaker wires is forbidden.  So a potential solution=20
> would be wireless speakers.  The maximum distance from the transmitter=20
> to the receiver is about 250 ft (or about 75 meters) with a couple of=20
> walls in the way.  It would appear that Blue tooth is not a viable soluti=
on.
>=20
>    Cost.  The completed system (1 Tx, 4 Rx) should not be more that=20
> about $600.  Less is MUCH better.
>
Another couple of thoughts (some DIY with amp/speakers as well) would be=20
to use either:-=20
http://www.crazy-audio.com/projects/raspberry-pi-for-audio-distribution/
with ethernet over mains modules.

or

simpler still (if you can find the hardware), Tandy/RS used to do=20
intercoms that worked over main supply using low frequency RF carrier.

George Smith


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