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PMC MB2S CLONE
PMC MB2S CLONE
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Old 16th August 2012, 09:23 PM   #1
stargeezerme is offline stargeezerme  United Kingdom
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Default PMC MB2S CLONE

Hi

I'm planing to create my own MB2 clones, using Volt RV3143, Volt VM752, Vifa D27TG-35-06.

The cabinet will be constructed from a combination of 20mm and 35mm HDF board.

Im still at the early stage of design with this, and wondered if anyone else has tried the same project.

Thanks
Attached Images
File Type: jpg pmc mb2.jpg (76.2 KB, 1805 views)
File Type: jpg pmc mb2 b.jpg (52.6 KB, 1743 views)
File Type: jpg MB2 1.jpg (106.4 KB, 1734 views)
File Type: jpg MB2 2.jpg (70.2 KB, 1753 views)
File Type: jpg midrange mount plate.jpg (163.2 KB, 1727 views)
File Type: jpg crossover.jpg (190.1 KB, 584 views)
File Type: jpg BB5 1.JPG (512.4 KB, 627 views)
File Type: jpg BB5 XBD REAR.JPG (36.7 KB, 581 views)
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Old 16th August 2012, 09:47 PM   #2
Scottmoose is offline Scottmoose  United Kingdom
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Probably, although you may have better luck posting in the multiway forum.

FWIW, I suspect you could get superior results with a redesigned line (I haven't modelled / back-engineered the PMC's line, but I would be rather surprised if that were not the case).
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Old 18th August 2012, 09:33 PM   #3
stargeezerme is offline stargeezerme  United Kingdom
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Does anybody know how they've constructed the cabinet? it has a gap of around 1mm along all the edges........
Attached Images
File Type: jpg 1335474451476512500.jpg (70.1 KB, 606 views)
File Type: jpg a.jpg (179.8 KB, 500 views)
File Type: jpg 17.jpg (190.2 KB, 429 views)
File Type: jpg mb2 back.jpg (24.1 KB, 418 views)
File Type: jpg mb2 front.jpg (34.6 KB, 415 views)
Attached Files
File Type: pdf mb2.pdf (90.7 KB, 217 views)

Last edited by stargeezerme; 18th August 2012 at 09:45 PM.
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Old 18th August 2012, 10:52 PM   #4
Bob Brines is offline Bob Brines  United States
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My guess is that the "gap" is purely cosmetic. When joining panels, particularly when one is veneer and the other is solid wood, a narrow dado is placed, usually on the veneer side. This makes it easier to transition from one material to the other.

Bob
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Old 25th September 2012, 11:47 AM   #5
stargeezerme is offline stargeezerme  United Kingdom
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More drawings
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File Type: jpg 263.jpg (420.0 KB, 668 views)
File Type: jpg 262.jpg (906.1 KB, 538 views)
File Type: jpg 266.jpg (552.1 KB, 556 views)
File Type: jpg 271.jpg (414.0 KB, 543 views)
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Old 10th March 2013, 04:36 PM   #6
mystoudio is offline mystoudio
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Cool SPEAKER PLANS FOR PMC BB5 AND XB3

HI... ANY SPEAKERS PLANS FOR PMC BB5 AND XB3 PLEASE

THANK YOU!!!
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Old 10th March 2013, 05:36 PM   #7
Scottmoose is offline Scottmoose  United Kingdom
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Try the multiway forum, and removing Caps Lock.

FWIW, since this is a commercial product, I rather doubt there are any official plans uploaded, and on the offchance anybody has the exact schematics, the legality of posting them would at best be highly questionable, since they are presumably the IP of PMC Loudspeakers. Equally, to work as PMC intended, you would need to use exactly the same drivers, crossover & construction materials as they do, in the latter case most obviously damping. PMC make their own foam or have a propriety type made for them, so you would need to somehow ascertain the precise damping properties of this and either get hold of some via unofficial means, or adjust the quantities, densities & locations of a more easily available type to ~mimic the behaviour of their own damping.

With all that said, there is nothing particularly novel about PMC's transmission line designs & you could design something similar or possibly superior easily enough.
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Old 11th March 2013, 02:01 AM   #8
xrk971 is online now xrk971  United States
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PMC MB2S CLONE
As Scottmoose said, Why would anyone have plans of a commercial product? Based on sketch above, it would not be hard to design a transmission line from scratch. Again, this is a multiway, we would only deal with a full range TL here anyhow. Also, given dimensions above, you can reverse engineer it if you wanted to.
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Old 21st March 2013, 08:56 PM   #9
stargeezerme is offline stargeezerme  United Kingdom
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Quote:
Originally Posted by Scottmoose View Post
Try the multiway forum, and removing Caps Lock.

FWIW, since this is a commercial product, I rather doubt there are any official plans uploaded, and on the offchance anybody has the exact schematics, the legality of posting them would at best be highly questionable, since they are presumably the IP of PMC Loudspeakers. Equally, to work as PMC intended, you would need to use exactly the same drivers, crossover & construction materials as they do, in the latter case most obviously damping. PMC make their own foam or have a propriety type made for them, so you would need to somehow ascertain the precise damping properties of this and either get hold of some via unofficial means, or adjust the quantities, densities & locations of a more easily available type to ~mimic the behaviour of their own damping.

With all that said, there is nothing particularly novel about PMC's transmission line designs & you could design something similar or possibly superior easily enough.
What he said above, spot on. Though im not too fussed about the copyright issue, because I believe PMC will know how hard it will be to replicate their products.

The internal design of the MB2 is still a bit of a mystery because i have found no information on it. I do however have the design of the BB5's because it was a back ground image in their MB2 / BB5 active brochure.
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File Type: jpg PMC BB5 XBD.jpg (296.7 KB, 809 views)

Last edited by stargeezerme; 21st March 2013 at 09:17 PM.
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Old 29th March 2013, 01:49 PM   #10
delapoer is offline delapoer  United Kingdom
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It would appear that either (or both) of PMC and Volt didn't mind making mid-range domes to almost the same design as the ATC ones when ATC stopped supplying them with their drivers! Maybe there was some legal agreement, or no patent/copyright, but the PMC versions are very similar to look at!
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