Hello, I am ready to run speaker wire in basement ceiling. I have numerous Romex power runs due to lighting, etc. in ceiling. Does it matter how close speaker wires are to electrical wires if I put speaker wire in conduit(should I use PVC or metal conduit? I also plan to use conduit from my equipment rack to future front projector for video cables, etc.(Should this be metal or PVC conduit?). I hope to buy conduit tomorrow, so I need your opinions ASAP. Thanks.