Just check on where the input cable is routed because it can pick up interference from just about anything in close proximity. I can get really terrible interference from my radar detector if its cables cross the aux input wires. You want to keep it as isolated as possible. I suppose you could shield it with something like aluminum flashing tape or a similar metallic material if need be. I wouldn't do that without then wrapping it with an insulator like electrical tape or heat-shrink tubing to make sure that it doesn't cause a short with something else.