Overdose said:Electrically, it is unlikely to be a problem either, as all of todays necessary electronics will be magnetically shielded.
A little pedantic, but modern electronics are not magnetically shielded. The only magnetic shielding you may possibly find anywhere in equipment would be around a hard drive. Old CRTs were particulary vulnerable to magnetic fields, beam deflection was driven magnetically and the shadow mask could also become magnetised. You either ended up with a wonky picture, or purple coloured grass. LCD / Plasma are not impacted by this. Should you wish you can balance your LCD on top of your unshielded speaker with no ill effect.