I'm trying to rid my speakers of the typical buzz from my iPhone. I get poor reception in my apartment and so it's constantly trying to find a signal, meaning I get a near-constant buzzing when the phone's anywhere near it. Airplane Mode works, but it's a pain to keep switching it on or off.
I use reference monitors as opposed to ordinary speakers, and each has an audio output cable (XLR, balanced), and a mains output (i.e. each speaker is powered independently). Do I need cores for all four cables, just the audio output, just the mains? If so, do they need to wrap TIGHTLY around the cables, or if they're loose and I secure them with tape, is it the presence of the cables that suppresses the noise?