Not too much... always on something we didn't wire but not very often.

We did recently do a house that sits under a radio tower and sure had a lot of stray signal running around there. Made it hard to deal with the WAP. Had elevator music through the phones until we used an OnQ surge. Best of all... our Velodyne sub would play a station (with low freqs only) when simply plugged in... no audio to it... plug the audio in and buzzomatic. Energy sub didn't do it for some reason... don't ask me... I don't even want to know.