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Full range planar speaker using neo magnets
Full range planar speaker using neo magnets
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Old 29th August 2012, 08:43 AM   #181
JAMESBOS is offline JAMESBOS  England
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Location: wigston leics england
Default MORE NEO REBUILDS.

Have decided against building anymore EPSILON style layouts and I am using 3mm tape now. Easier and just as sensitive, you live and learn, it's also a lot easier and quicker. My back is happier as well. I still have alot more rebuilds to do with the new tape.All the blue ones 9 of them. I will finish my headphones one day. I have finalized the 2 designs at last. I will have to swap ears to find the best layout as I have 2. The A4 size design is only half finished 1 more to build.When I get my carport I will be putting 2 on the wall outside to try. Big ones 4' x 2' with acoustic insulation at the rear.Any suggestions would be appreciated.
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Old 29th August 2012, 10:28 AM   #182
RogerGustavsson is offline RogerGustavsson  Sweden
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Quote:
Originally Posted by JAMESBOS View Post
Have decided against building anymore EPSILON style layouts and I am using 3mm tape now. Easier and just as sensitive, you live and learn, it's also a lot easier and quicker.
Where have found 3 mm wide aluminium tape? What is the thickness of the aluminium?

Roger
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Old 29th August 2012, 11:11 AM   #183
chrapladm is offline chrapladm  Australia
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I have always wondered about these planar type speakers but never really understood how they work. What determines the low frequency cutoff?

Is it just the size?

I have always wanted to make a large one for subwoofer duties after seeing one of the ribbon manufacturers make a subwoofer that could play from 4-16hz I believe. Was amazing but they would not tell me anything about their technology.

But I always seem to see you making new speakers JAMESBOS so I wonder if you might know?
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Old 29th August 2012, 11:30 AM   #184
JAMESBOS is offline JAMESBOS  England
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themaskingshop.co.uk is the place to go for 3mm tape,The thickness is 6/100 of a millimeter.
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Old 29th August 2012, 11:31 AM   #185
RogerGustavsson is offline RogerGustavsson  Sweden
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It is kind of complicated... The low frequency cut-off is determed by several factors. The tension of the diaphragm, the mass of the diaphragm, the size of the diaphragm, the size of the baffle etc. That subwoofer you mention, do you mean the french Infra Planar? It is far from what you see hear in this thread.
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Old 29th August 2012, 11:37 AM   #186
RogerGustavsson is offline RogerGustavsson  Sweden
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Quote:
Originally Posted by JAMESBOS View Post
themaskingshop.co.uk is the place to go for 3mm tape,The thickness is 6/100 of a millimeter.
Thank you. It seem to be 40 m Aluminium Foil, not 60m. It can be checked with a suitable multimeter. Just measure the resistance for several meters. Should be about 0.22 ohm/m for 3 mm wide tape.

Last edited by RogerGustavsson; 29th August 2012 at 11:40 AM.
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Old 29th August 2012, 11:46 AM   #187
JAMESBOS is offline JAMESBOS  England
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Join Date: Jan 2007
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I did use a multimeter and it is 60um. It is glued and masked very easy to use.Especially to turn, you don't need it any thinner, else it will rip when using. Have done that a few times using the CPC 9mm tape and the 4.5mm tape when I cut it in half. Easy with scissors. Glad I don't have to cut anymore hundreds of meters. Not really designed any sub woofers, as the 4' x 2' using ferrites goes down low anyway no need for a sub woofer to my ears. The bass is very tight and non resonant compared to the QUAD ESL's. I have these as well. Much prefer my own designs in comparison. A lot easier to build and repair as well.Only 1.66 for 60 meters very cheap.Flemings left hand rule explains how they work.
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Last edited by JAMESBOS; 29th August 2012 at 12:02 PM.
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Old 29th August 2012, 12:13 PM   #188
RogerGustavsson is offline RogerGustavsson  Sweden
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I believe you but it is with the glue, if you did not remove it first. I am planning to rebuild Magnepan speakers and then 3x0.06 mm is not really suitable.
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Old 29th August 2012, 12:20 PM   #189
chrapladm is offline chrapladm  Australia
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Transmission Audio Inc.
A little past half way on the page they have a prototype subwoofer.
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Old 29th August 2012, 01:54 PM   #190
RogerGustavsson is offline RogerGustavsson  Sweden
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"No release date as of now." Three years ago.

Transmission Audio are still only using dynamic drivers in the bass. Price is rather elevated for the larger systems....
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