Can someone advise what is a safe distance to place non-shielded speakers from a CRT television... by safe I mean a distance that will ensure the picture is not affected by the speakers magnetic field.

I appreciate this may vary based on TV, speakers but a ball park idea whould be great - eg "24 inches or more"

TV = 81cm Grundig Elegance 16:9
Speakers = Wharfedale Diamond 8.3

Thanks.