The Niles Audio DBI-2 was the most popular solution in home automation systems, but it was discontinued about a year ago. Below are replacements I've seen recommended on various forums, in addition to the Gilderfluke mentioned above:
Here's seconds and thirds for Gilderfluke. See the link below for an item I put in that announces entry to the foyer and plays for twenty seconds after people leave the foyer. Sound ramps up and down appropriately.
It uses a PIR sensor triggering the Gilderfluke combo stereo power amp and SD chip playback unit in the video. It's been going for eight years now.
Here it is:
The range of other stuff they have is fantastic.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
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