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Old 10th September 2010, 04:37 PM   #31
WrineX is offline WrineX  Netherlands
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whooo thats sounds awesome james, i still have like 4 panels of magnepan smg a standing around with broken mylar or coils destroyed etc. im planning on recoiling it with the cpc security tape, wich is much lighter then the orignial coil, also foil can get rid of heat muich more easy then the wires so i might get away with less aluminium higher resistance lower weight but maybe can handle same power because of the better heat dispersion. only trouble might be the higher resonace frequency, so im planing on dampening with vilt and using 2 panels a side, and then use a electrostatic for the high freq 1K and up or even lower, depends on how low a verry small stat can go because i want dispersion to be good. i think we get best of both worlds with this design ,both are dipole speakers , magneplanar is better in low freq where stats own magneplanars in mid and highs. no expensive tranformers with huge stepups no saturation no mirror drive etc.

when i use all four pannels i could use them serie we might end up in 8 ohm range and spread the power. i would have a huge huge bass panel aroud the 2,2 meter high and a verry narrow tweeter/midrange of 3 cm width and 2 meter high (maybe less nobody is 2 meters long when sitting down )

wich such huge magneplanar i could lower the resonance freq of the bass without mylar hitting the magnets because they get half the power the would have normally

Last edited by WrineX; 10th September 2010 at 04:43 PM.
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Old 11th September 2010, 04:57 PM   #32
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Has anybody here tried

File:InfiniteHalbachArray.JPG - Wikipedia, the free encyclopedia

halbach arrays?

There is a new thread by Andrew Eckhardt ...


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Old 11th September 2010, 05:57 PM   #33
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here is the article about Halbach arrays.I will try to make a femm sim.
Halbach array - Wikipedia, the free encyclopedia
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Old 11th September 2010, 07:00 PM   #34
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Here is my femm.simm.
[IMG]Click the image to open in full size.[/IMG]
[IMG]Click the image to open in full size.[/IMG]
[IMG]Click the image to open in full size.[/IMG]
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Old 11th September 2010, 07:08 PM   #35
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Hi bandsei,

In words ?

Usable or not suitable for isodynamic speakers,
when compared with your previous results ?
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Old 12th September 2010, 07:51 AM   #36
Baldin is offline Baldin  Denmark
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Hi LineArray

I see a problem in that the HalbachArray will produce a "plate" of magnets with no airflow through .... you will always want the membrane to be as close to the magnets as possible, (trade off btw. field strength and Xmax) .... with the Hallbach you will at best get a high degree of compression ...
I haven't looked/simed at the field strength, but putting magnets close together with different polarisation I would think you loose a lot of strength ..... but thats only my guess .... so, no I do not think it is applicable for this kind of speakes ....
But thanks for taking it up
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Old 12th September 2010, 08:53 AM   #37
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Hi Baldin,

yes it was just a "quick shot",
i see the perforation problem ...
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Last edited by LineArray; 12th September 2010 at 08:55 AM.
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Old 12th September 2010, 09:08 AM   #38
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Henry, can we see some photos on your speaker?
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Old 12th September 2010, 10:29 AM   #39
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Here is a simm with the same magnets just 4 magnets can make a stronger field than 9 magnets in the Halbach array.
The curves B,t shows the strength tangential or as the wires in a planarspeaker "sees" it.
[IMG]Click the image to open in full size.[/IMG]
[IMG]Click the image to open in full size.[/IMG]
[IMG]Click the image to open in full size.[/IMG]
So Halbach won´t bee usefull for planar speaker´s
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Old 12th September 2010, 06:32 PM   #40
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Hello Bandsei,

thank you for your patience in analysing that !

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