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Old 11th September 2011, 03:23 AM   #111
tmblack is offline tmblack  United Kingdom
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Henry

how far apart are the magnets, and how far is the plastic sheet from the magnets?
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Old 11th September 2011, 09:21 AM   #112
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The magnets are actually touching and the distance between the membrane and the magnets is 3 mm.
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Old 11th September 2011, 04:31 PM   #113
tmblack is offline tmblack  United Kingdom
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In the Apogee series the aluminum conductors run horizontally and there is a vertical gap about 1/4" between the rows of magnets.
Did Apogee use ceramic magnets or Neo?
All I need is a source of cheap magnets to try this!
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Old 11th September 2011, 06:23 PM   #114
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I don't think neos were available when the Apogees first came out! You can build a small 60 X 40 cm speaker using neos. This size is my latest design, as bigger ones were not really any louder than the small ones. A 4' x 2' was not really worth the extra magnets. I would recommend you use 50 x 6 x 3 mm magnets and use 3 mm wide aluminium foil. This would give you the highest sensitivity and would fit in with the size of the speaker.If you can't find any foil this size use scissors and cut it to this size, that is what I do. I must have cut about 450 meters up to now!!! I'm afraid magnets have increased considerably in price in the last few years.I got mine from China as this was the cheapest I could find, although the postage is quite high they still worked out cheaper in the long run. Although I don't know if this is still the case, as I have not bought any for quite a while!
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Last edited by JAMESBOS; 11th September 2011 at 06:31 PM.
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Old 11th September 2011, 07:59 PM   #115
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My Apogee Duette's have ceramic magnets.

Jer
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Old 12th September 2011, 06:43 AM   #116
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Quote:
Originally Posted by geraldfryjr View Post
My Apogee Duette's have ceramic magnets.

Jer
Mine too.
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Old 12th September 2011, 09:07 AM   #117
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Default What about building something this size..

Anybody has tried this size?
I spent more time at the computer than at the "listening room", as many of you are..



Magnepan Mini Maggie Desktop Speaker System (Playback 48) | AVguide
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Old 12th September 2011, 09:10 AM   #118
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Default another picture

seems "easy" to clone, and uses few magnets
it reminds me the moonsons
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Old 12th September 2011, 06:49 PM   #119
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The smallest FRP that I have built up to now is 14.5 x 20 inches, using 116 50 x 12.7 x 3 mm neo magnets in each one. I built these to fit a underfloor loaded speaker which used 1 18" cone and 2 piezo speakers.I built the planar to try out the small size,in comparison to my 60 x 40 mm size of which I have 11 hanging up in my living room with my new 9.1 amp. I'm glad they didn't cost me 1500 a pair or a trio.
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Old 12th September 2011, 08:09 PM   #120
tmblack is offline tmblack  United Kingdom
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Magnepan must be using ceramic magnets, the MMG-W is very cheap and similar in size.
Anyone heard that one?

Last edited by tmblack; 12th September 2011 at 08:31 PM.
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