Quote: Originally Posted by kamikaze2112
sub magnets, depending on size can have magnetic fields well over 6 inches. I almost buggered up a CRT by sitting a sub in my lap and searching on the internet....
Technically, the magnetic fields extend to an infinite distance. Either way, I've found that CRTs are affected LONG before hard drives. Working at a particle accelerator, every CRT in the place would get a purple hue when the main magnets were ramped, but there were hard drives which ran for years while all this was going on.