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Old 22nd November 2012, 03:14 PM   #81
a.wayne is offline a.wayne  United States
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Are you using neo or ceramic ....?
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Old 22nd November 2012, 03:24 PM   #82
Paul W is offline Paul W  United States
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Neo, N42 or N50...don't remember.
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Old 22nd November 2012, 03:26 PM   #83
HellMan is offline HellMan  Finland
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Thanx a bunch guys!!

Neos here too...
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Old 22nd November 2012, 05:16 PM   #84
dacen is offline dacen  Norway
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I have used ordinary ceramic magnets for both MR/T ribbon and the bass membrane. For the MR/T I have used 20 mm X 40mm, thickness 10mm. The magnet gap is around 23mm.
I have no problem with the sensivity on this one. On the bass panel I have used 25 mm X 40 mm, thickness 10mm. On some recordings I have sometimes wanted the sensivity on the bass membrane to be a little higher, but for normal listening it is OK. Neo´s are a very good choice here. I am using separate amplification for the two.
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Old 23rd November 2012, 02:08 AM   #85
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Does the strength of the magnet, say N42 versus N50 make cause for more room between ribbon and magnet?
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Old 23rd November 2012, 03:37 PM   #86
a.wayne is offline a.wayne  United States
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Quote:
Originally Posted by dacen View Post
I have used ordinary ceramic magnets for both MR/T ribbon and the bass membrane. For the MR/T I have used 20 mm X 40mm, thickness 10mm. The magnet gap is around 23mm.
I have no problem with the sensivity on this one. On the bass panel I have used 25 mm X 40 mm, thickness 10mm. On some recordings I have sometimes wanted the sensivity on the bass membrane to be a little higher, but for normal listening it is OK. Neo´s are a very good choice here. I am using separate amplification for the two.
With ceramic's difficult to get sensitivity over 80db/m/2.83v
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Old 23rd November 2012, 08:51 PM   #87
dacen is offline dacen  Norway
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Compared to the quality of sound these speakers produce the sensivity is a very minor issue. They produce an outstanding sound, so I will encourage others with DIY skills to go for it.
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Old 24th November 2012, 04:14 PM   #88
a.wayne is offline a.wayne  United States
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Neo's are way too costly unless you are building a small ribbon , so i would like to focus on improving efficiency with ceramics as best as possible , motor design etc ..
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Old 26th November 2012, 12:01 AM   #89
a.wayne is offline a.wayne  United States
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I guess no interest .....!!!!!
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Old 27th November 2012, 08:43 PM   #90
hanski is offline hanski  Finland
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About the magnet gluing.
My 25mm wide magnets stay well without glue. Only the two last magnets on the line repel each other so much that it causes 2mm gap.

I have also the tweeter ribbon with 10mm wide magnets. I did glue them but wouldn't do again. Gluing 400 pcs. magnets is not the most satisfying job.
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