On August 31, 2018 at 16:17, buzz said...
"Sources" tend to have a low output impedance. "Inputs" ("Sinks" if you like) have a high input impedance in order to reduce circuit and cable loading. The low impedance tends to swamp electric field related noise injection with signal.
An extreme case would be connecting an open RCA patch cord to a Phono preamp input or a high impedance microphone input. It is likely that there will be hum and noise picked up from the surrounding area. On the other hand, it is not likely that an open speaker wire connected to a speaker will pickup enough energy to be an issue. (However, close to a broadcast radio transmitter I have experienced this with long speaker wire runs)
I went to CEDIA in 2005 and the guy who spoke at the Audio Setup and Measurement told us that all speaker wires should be the same length and answered "Yes" when one of the guys I worked with asked if the long cables on short runs were to be be coiled up and left in the walls and ceilings. I'd like to see how well the speaker would survive if lightning suppression cabling was in the adjacent stud bay in this case.
