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What's the purpose? None. Just naive curiosity. Us Norweigans discovered America you know.
Many of the high-end mids I've seen have long, slender, gay-looking magnets.
When the magnet is the same size as the frame the wave alledgedly makes the cone distort. I figure the same applies to woofers, maybe even more so. I saw a diagram somewhere, but even if I could find it I wouldn't know how to post it.
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Posts: 323 | From: Great Falls, Montana | Registered: Feb 2000
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Well it makes sense, energy deflected off the magnet preventing cone motion, however, its a little anal retentive IMO, like worrying about .01 vs. .009 % THD+N
ShadowStar
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Posts: 2578 | From: Somewhere In the Northeast | Registered: May 1999
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posted
The energy radiates off the back of the cone perpendicular to it... This means that almost no energy hits the magnet and certainly cannot be reflected back on the cone. Of more importance is the angle and structure of the basket. The best mids have thin cast legs to allow enrgy to pass. I believe the sole reason there are sealed back mids is because of manufacturers too lazy to section their home cabinets!
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That is the only reason. One of my pairs of speakers uses that crappy design philosophy. Then they throw a bunch of plastic and specs on the front to make it look purty. I wanna puke when I see them.
About the magnet causing distortion, what you said makes more sense than what I was reading on some site. Since the cone and magnet are generally at about a 45 degree angle, it would only make a nominal difference.
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Posts: 323 | From: Great Falls, Montana | Registered: Feb 2000
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