Magnet driver mount

inrank · 8th August 2009, 11:58 AM

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)

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.

stee-b · 8th August 2009, 11:24 PM

Could you trap it between a baffle and a sub baffle?

xecluded · 9th August 2009, 12:47 AM

I haven't but it's a darn good idea.

inrank · 9th August 2009, 11:34 AM

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.

chrisb · 10th August 2009, 06:01 PM

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.

inrank · 11th August 2009, 11:33 AM

Ta, it was just an idea i had while playing around with speaker designs

stee-b · 11th August 2009, 06:59 PM

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 ?

chrisb · 11th August 2009, 08:28 PM

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/

stee-b · 11th August 2009, 08:48 PM

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

8th August 2009, 11:58 AM	#1
inrank diyAudio Member Join Date: Oct 2005	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) 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.

10th August 2009, 06:01 PM	#5
chrisb diyAudio Member Join Date: Aug 2002 Location: victoria BC	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. __________________ you don't really believe everything you think, do you? community sites t-linespeakers.org, frugal-horn.com commercial site planet10-HiFi

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8th August 2009, 11:24 PM	#2
stee-b diyAudio Member Join Date: Apr 2003 Location: nott'm	Could you trap it between a baffle and a sub baffle?

9th August 2009, 12:47 AM	#3
xecluded diyAudio Member Join Date: Jul 2008 Location: 10,000 lakes	I haven't but it's a darn good idea.

9th August 2009, 11:34 AM	#4
inrank diyAudio Member Join Date: Oct 2005	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.

11th August 2009, 11:33 AM	#6
inrank diyAudio Member Join Date: Oct 2005	Ta, it was just an idea i had while playing around with speaker designs

11th August 2009, 06:59 PM	#7
stee-b diyAudio Member Join Date: Apr 2003 Location: nott'm	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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