don't worry about anything else. It does no harm ( not even to your screen )It's just the magnet pulling the electrons from the gun tube to the tits up side. Moving the speaker is the easy answer but a shield ( which is what you have in a telly, most modern speakers and monitors ) will take care of it.
(
Pasanonic 's been known to cause insanity in laboratory mice,
Tue 24 Jul 2007, 19:00,
archived)