Gonk this reminds me are FL/FR unshielded ever a problem normaly with the display?

I'm pretty sure the new Beethovens ARE unsheilded (Haven't confirmed yet) The center they sell the Mastro is shielded.

I think???? this may not be a prob. with an LCD anyway, but could it...if I ever have a CRT around the fronts?
Whats the 'rule of thumb' on distance?