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Magnetic field redirection? Answered

Hi, I've never seen a community so welcoming and intuitive than the instructables community, so I decided this website is the best place to ask my question. I'm sure there is someone hidden deep within the fathoms of instructables that is versed in the matter of magnetic field redirection.

I'm working on a project that I will post an 'ible of, (truly wireless speakers ;)) but I need some method of redirecting a magnetic field so it doesn't interfere with the speakers. I have heard of some methods, i.e. Mu metals, MagnetShield, but these are not easy to come by, especially in the UK. I have considered ordering from the manufacturer, but I am not willing to pay the exorbitant shipping costs.

I would firstly like to know if such a material exists, or if alternative/better/cheaper methods are available, secondly, whether or not it can be procured in the UK, and if so, where, and thirdly, proper application of such a material.

I have done lots of research into the matter, but have been left fruitless. I'm sure someone can help.

                                                                Merry Christmas,



Best Answer 8 years ago

What are you worrying about protecting the speakers from? Odds are that their own magnetic fields are strong enough that you really aren't going to interfere with them; as I said in my comment on Steve's post, the problem more often goes the other direction, and then only when there's something like a CRT or magnetic media to worry about.

If there's really a problem, you could try a pair of the PC speakers which are shielded so they won't interfere with a CRT. That same shielding should keep other magnets from interfering with them. These are widely available at fairly cheap prices.


8 years ago

Try a piece of sheet steel. Mumetal is a.) Expensive and b.) very difficult to use in practice - it can't be bent without buggering its magnetic properties, and requires annealing in a pure hydrogen atmosphere.

Steel is cheaper, not as good, but probably good enough.



Answer 8 years ago

+1. I've seen folks use (non-stainless) steel cookie sheets to help protect CRT monitors from loudspeaker magnets when the two couldn't simply be separated by a few more more feet and shielded speakers weren't available.