Monitor and magnetic field : what is the safe distance?

[Le Québécois]

I'm buying a new monitor next week.
LG 995ft
or
LG 915ft
I still don't know which one, but that's not the point here.

I'm using a Stereo speakers for my computer, not computer speakers.
They are located about 40cm (16") from the edge of the monitor.
I've been doing this for at least 3 years with my old generic 15" monitor and it don't seem to have been damaged by the magnetic field.
My problem is that my new monitor will be a 19"....so it mean about 2" closer to the speaker. Is it dangerous for the monitor?
If it is, what's a safe distance?

 

[Mday]

there is no way of telling the safe distance.

the magnetic field intensity (B) drops off at a ratio the inverse of r squared, where r is the distance from the center of the magnet. since we don't know the intensity of the magnets inside the speakers there is no real way of saying.

however, 14" seem fine,depending on the size of the speakers. some speakers are magnetically shielded though, but i suppose yours are not.

the only way of telling really is to actually do it. if you notice any geometric or color problems by moving the speakers closer, you have a problem, prolonged exposure to the field will alter the deflection of the electron gun. however, that can be fixed with a degaussing coil or wand.

one note on observations i have made: monitors made years ago have stronger shielding than newer ones...

 

[sohcrates]

yeah, you really can't accurately determine a distance...there's too many factors.

but if you see magnetic interference, you'll know you're too close

don't worry about damaging the monitor during initial testing...that's what the degauss button is for