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Old 22nd March 2012, 05:20 PM   #1
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Default THAM12 - a compact 12" TH

Hello all !

For some time now I have been pondering the concept of a 12" TH, I have also noticed several threads poping up regarding 12" TH's, so why not make a contribution ?

A coupple of weeks ago my good friend Johannes Rodin really kicked it off by sending me the spec's for the Beyma 12P80Nd driver, and this driver became the base for the development, but then I realized that it was rather expensive.

The THAM12 is roughly half the size of a THAM15, but it should still provide a good alternative to the other great designs out there, especially if you are after a very compact solution.

Thanks (again) Johannes for providing great ideas and helping out with the balancing of different driver proposals.

This is the THAM12 :

Martinsson's Blog -THAM12

(includes drawings and simulations of numerous drivers)

example with B&C12PS100 in 1PI env. :
Click the image to open in full size.

Enjoy! // Martinsson

Last edited by martinsson; 22nd March 2012 at 05:23 PM.
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Old 22nd March 2012, 09:48 PM   #2
Thawach is offline Thawach  Thailand
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hi martin many times i don't ur tham because very difficult to find the drv in thailand and do well with the tham. this tham will ok. looking for the graph i will be satisfy. the p audio sn12 500b und one system drv from a new factory in thai sim so good. one system und ok ill save ur plan thanks
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Old 23rd March 2012, 03:04 PM   #3
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Thanks Thawach, and thanks for sharing your findings, I'll look into these drivers aswell.

I have also heard that the JBL GTI1200 (carwoofer) and Beyma 12P80Fe works fine in the THAM12, good news, it seems my goal of making one box fits (all) well most of them is well on its way to be realized

Anyone else got any good candidates not allready discovered out there ?
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Old 21st July 2015, 04:41 PM   #4
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I'm looking to try Beyma 12BR70 with THAM12, but I have no idea how to simulate it with hornresp. I'd like to know if it'll work, so if somebody is willing to simulate it, here are the specs:

http://www.beyma.com/getpdf.php?pid=12BR70
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Old 21st July 2015, 07:02 PM   #5
Zwiller is offline Zwiller  United States
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I ran it and it did not look good. Sorry, please try again. In your defense I've not found much that works in it myself (besides the recommended ones). See if you find something with smaller Vas around 50L.
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Old 22nd July 2015, 07:35 AM   #6
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The price goes up as the Vas goes down. So basically this horn needs these kind of drivers due to its size?
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Old 22nd July 2015, 02:16 PM   #7
Zwiller is offline Zwiller  United States
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I think so. If cab size if not critical, the THAM15 is VERY driver friendly. A properly loaded THAM12 is crazy good considering it size IMO. So it's size vs price...
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Old 22nd July 2015, 02:20 PM   #8
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Cheap 15" are in the same price range with good 12". Other than that, I don't think I have space for tham15. It's a room sub afterall.

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Old 22nd July 2015, 03:04 PM   #9
Zwiller is offline Zwiller  United States
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Do a nice BR for a room sub or maybe you can find a 10" that works. SM-110sn was decent and 10BR60 not bad.
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Old 22nd July 2015, 03:23 PM   #10
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I wonder if a 10 inch with a smaller vas would work in a tham12. Or maybe the horn diameter was calculated for 12 inch.

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