A:Answer Nothing in the specifications or user's guide says they are, so I seriously doubt it. But unless you're using an old CRT monitor, where you position the speakers relative to the monitor is utterly irrelevant - LCD displays aren't affected by magnetic fields. (And anyway, magnetic fields don't "damage" CRT monitors, so if by some truly wild chance you're still using one of those and it does cause the display to distort, you could always just move the speaker until the effect stops.)
As for positioning it near a PC, don't worry about that either. The whole idea that ordinary magnetic fields will erase or corrupt data on hard drives is basically an urban myth, albeit one at least based in "fact" (of a sort). It would take a VERY strong magnetic field to affect a computer hard drive (and if you have an SSD, it would be, again, utterly irrelevant). And when I say "very strong magnetic field," I mean nothing short of what you might have to worry about if you' were trying to use a laptop with a mechanical HD while having an MRI taken<lol>, or if you lived or worked next door to a high energy particle accelerator. (That's a joke, of course...)