Summer Project - Replication of MBL loudspeaker 101mkII - Page 4 - diyAudio
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Old 15th April 2013, 08:59 AM   #31
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Default First official build

This has been a long time coming. The first official mbl clone build is here, further post will show the final result and measurements. This build has all the proper materials and dimensions as the real thing. The build I feel came out very nicely. I used job specific aligning rigs and shim with which I was able to get a near perfect alignment. Ofcourse there are improvements to be made in the construction of the clone.
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Old 16th April 2013, 10:51 PM   #32
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Long summer then?
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Old 19th April 2013, 03:48 AM   #33
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Default Motion Video

Yes Bear a very long and arduous summer.
Here it is, a video recording of the first official mbl clone. The advancements in the construction and materials from the previous one is massive. There are still improvements. Right now it is playing without a spider. I Would like to here Diy Audio's input.

http://www.youtube.com/watch?v=8c8tZKAOA3Q

Sound Review

The sound is pretty clean with nicely rounded mids and highs. There seems to be no peak in the frequency graph, like should be expected with composites. The sound is big and open with a tactile texture to the instruments. I have high hopes for this project, seeing how this is only the first of many revisions. The video does not do the clone justice.
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Old 19th April 2013, 04:19 AM   #34
JMFahey is offline JMFahey  Argentina
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Congratulations on a VERY advanced and impressive project
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Old 19th April 2013, 03:03 PM   #35
Paul W is offline Paul W  United States
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Video is marked "private"? Very impressive work!
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Old 19th April 2013, 09:42 PM   #36
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Default Video is now set to public

Video is now set to public.
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Old 22nd April 2013, 08:29 AM   #37
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Impressive!
I also wanted to make two mid balls for deskop use, just need one (or two!)free summer!.
till the free summer arrives, I'm still struggling with a pair of home made mini maggies.
I'd like to know the frec response of your mid units. May be they are scalable to almost "full range" on low power..
keep the good work
Pedro
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Old 2nd May 2013, 10:32 AM   #38
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Default let's do mini melons!

I'm still thinking about these speakers...
From the pictures I can't see if the gap between the petals of the diy version is sealed. I can see the poliester damping inside but... must the spheres be airtight?
if so, how?
the mbl originals seem to have a rubber preshaped piece that fully seals the gaps, but can't imagine a diy substitute for that, one that let the petals flex more at the ecuator than on the poles...
more pics, please!

Another question is the ferrofluid damping.
use a comercial ferrofluid or a home one made will do the thing?
and... just pours the liquid into the gap and it stays there? just by magnetical force? any help?

go on, let's do mini melons!

Pedro
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Old 2nd May 2013, 03:31 PM   #39
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Default Lets do it!

Hello Karellen. From the lastest image only the lamellas and seal is shown. The poly-fill cannot be seen from the perspective shown. The seal is exactly the same dimensions and topology included. Total mass comes in at 7.00g. Ferro-fluid "adheres" to the magnetic parts of the motor. So far I have not used Ferro-fluid. I will upload a video recorded with a hifi microphone when I get home.
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Old 3rd May 2013, 05:57 AM   #40
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Default Update

I have semi finished version 1.0. On the previous video filler, and tension rods had not been installed. The sound is much cleaner. The sound is a lot more focused without the tinny and hard sound of the previous video. The clone was recorded using an omni mic.

Link to video
223 - YouTube

New pictures of "completed rev 1.0".
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