I am looking into adding a doorbell to a Sonos System. I was looking at the RDL FP-CH8, which looks like it will sieze the speaker level, and play a tone when the doorbell is pressed. My question is: Does anyone make one of these modules that will do several pairs of speakers? Like four input, four output?

Here's the link to the RDL piece:
[Link: rdlnet.com]

Thanks,

Mike