Thanks. I have the speaker kit. Its mainly the video I will use, I reckon, and your idea about using a relay for the mic is very good (sometimes the simplest ways are the best). If someone rings the doorbell, we want to pop the video up and let the user talk to the caller. As long as the speaker is able to reproduce the odd grunt and grumble of the pizza man, it should hoipefully be OK, else I'll have to route it thru the Adagio and have the whole block know there's pizza arrived !!!

Cheers