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Old 8th August 2009, 11:58 AM   #1
inrank is offline inrank  United Kingdom
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Default Magnet driver mount

anyone tried holding the frame of a driver onto a baffle with magnets set into the wood?

Got an idea of cutting down the frame of a driver - (to get a neater finish)

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Then use small magnets set into the baffle to hold the driver instead of the screws.

Its a light driver and in OB so no real forces to deal with i think.
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Old 8th August 2009, 11:24 PM   #2
stee-b is offline stee-b  United Kingdom
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Could you trap it between a baffle and a sub baffle?
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Old 9th August 2009, 12:47 AM   #3
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I haven't but it's a darn good idea.
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Old 9th August 2009, 11:34 AM   #4
inrank is offline inrank  United Kingdom
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The plan is to have something similar in style to the B&W FST driver, with a neat look. Also like the new NXT BMR drivers.
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Old 10th August 2009, 06:01 PM   #5
chrisb is offline chrisb  Canada
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I think you'd find that the inertial forces imparted by the driver are greater than you might suspect, and would require substantial magnetic flux to hold securely in place.


I could be way off base, but since it's not likely that the mounting rim of the basket frame, whether stamped or cast, would achieve adequate galvanic isolation, I'd be concerned that eddy currents from a sufficiently strong magnetic attachment system could affect the motor assembly.
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Old 11th August 2009, 11:33 AM   #6
inrank is offline inrank  United Kingdom
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Ta, it was just an idea i had while playing around with speaker designs
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Old 11th August 2009, 06:59 PM   #7
stee-b is offline stee-b  United Kingdom
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I've had a look through my favourites but can't find the link to an open baffle builder that mounted the full range by its magnet. This set up could easily allow you your 'clean baffle' look.

Any one know what I mean ?
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Old 11th August 2009, 08:28 PM   #8
chrisb is offline chrisb  Canada
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Quote:
Originally posted by stee-b
I've had a look through my favourites but can't find the link to an open baffle builder that mounted the full range by its magnet. This set up could easily allow you your 'clean baffle' look.

Any one know what I mean ?

that sounds like something from the Hawthorne Silver Iris builders' forum, to name at least one location:

http://www.hawthorneaudio.com/forums...php?f=2&t=2704

As best as I can recall, a couple of DIY methods involved either the fabrication of felt lined, split wooden yoke that clamped around the perimeter of the magnet; or the use of metal band clamps. In either case, they then attached to main baffle via a variety of cinfigurations of supporting struts / frames.

Of course, creative design and precision machining in aluminum, etc., could give you a variation on something like this:

http://www.jamospeakers.com/na-en/pr...9-description/
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Old 11th August 2009, 08:48 PM   #9
stee-b is offline stee-b  United Kingdom
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Quote:
Originally posted by chrisb



that sounds like something from the Hawthorne Silver Iris builders' forum, to name at least one location:

http://www.hawthorneaudio.com/forums...php?f=2&t=2704

As best as I can recall, a couple of DIY methods involved either the fabrication of felt lined, split wooden yoke that clamped around the perimeter of the magnet; or the use of metal band clamps. In either case, they then attached to main baffle via a variety of cinfigurations of supporting struts / frames.

Of course, creative design and precision machining in aluminum, etc., could give you a variation on something like this:

http://www.jamospeakers.com/na-en/pr...9-description/
Very similar in the link and I think the description you give is about spot on. There was a great write up with lots of pics, but for the life of me I can't find it
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