Speaker Specialists in Seattle Area

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MOSFET - 19 Apr 2006 06:19 GMT

I am still working on magnetically shielding my center channel. Thank you
to everyone who helped on the previous post!

I am interested in buying those bucking magnets at Madisound, but I have no
idea what size magnet I need. Is there any way to calculate what I need to
cancel out the magnetic field of the speakers? Is it basically trial and
error? If so, I should try to find a local Madisound dealer so I can bring
my speaker in and play with different magnet sizes.

Any advice regarding this would be appreciated. I have also been shopping
around for a new center channel speaker, but it's very discouraging as I
would have to spend at least $300 to get as good a one as I have now, yet
those bucking magnets are just a few "bucks" (yuk, yuk). That is really the
way I want to go. I live in the Seattle area, is there any company that
specializes in speaker repair that might be able to help?

Thanks guys!

MOSFET

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KU40 - 19 Apr 2006 13:55 GMT

try Dan Wiggins at Adire

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KU40

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John Durbin - 20 Apr 2006 07:39 GMT

You want a magnet smaller than the driver's magnet, something in the 2/3
size range probably. If you use the same size/flux magnet as the main
one it will more significantly change the driver's Qts. A smaller magnet
with the can will give you more than enough reduction in stray flux to
solve your problem. A lot of the a/d/s/ systems we sell are shielded,
and the bucking magnet is typically thinner than the main one but about
the same diameter.

JD

> I am still working on magnetically shielding my center channel. Thank you
> to everyone who helped on the previous post!
[quoted text clipped - 15 lines]
>
> MOSFET

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