seasons greetings ! 
Monday, December 23, 2013, 19:11
Posted by Anders


2014 might turn out to be quite an interesting year !

Take care all, and remember to share your knowledge, your passion, your important mistakes and your fortunate findings so that others out there can enjoy and learn from it.

Respecting all visitors to this page I say Merry Christmas to those of you who share in that tradition, and a happy new year, when ever it might be ! / martinsson
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Teaser one ... 
Wednesday, November 6, 2013, 22:06
Posted by Anders

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TPAM10HTL - like the TPAM10HT, only more. 
Wednesday, May 29, 2013, 18:52
Posted by Anders
Designed shortly after the TPAM10HT and is to be regarded as a preferred design of the two if you are scouting for a 26-90Hz sub to use in HT or hi-fi applications.

It does not reach as far down in the deep as the TPAM10HT which can offer a solid 20Hz reproduction, but compensates greatly for this by it's higher sensitivity, greater definition and SPL capacity, all in the same size.

When compared in room the difference in lower frequency cut off is hardly noticeable between the two, the character in favor of the THPAM10HTL is however most definitely noticeable.

The design below is intended for the 10NW64 from B&C, and allows for the driver to be mounted with the cone visible, this is why there is a double baffle, to create the depth required (>100mm) for the drive assembly (magnet).













Simulation input data for Hornresp is included in the picture above, so please feel free to experiment with other drivers, just pay due attention to the mounting depth as stated above, simulations will be provided shortly.

The second top most brace is not dimensioned with regards to its position along the path, but this oversight is not critical, just put it roughly where you see fit.

Material used is 15mm Plywood.
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Thoughts about sharing. 
Friday, February 15, 2013, 19:18
Posted by Anders
The interest in the designs has grown to far beyond the ability to manage with regards to various inquiries, and it keeps growing.

The designs has never yielded any form of monetary support, the reason for this is you, you share your knowledge, insight and support in various forms of communication, and the results here are what they are because of you, take no credit unless credit is properly distributed, the credit is yours.

Thank you! - keep sharing!


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THAM18 details 
Tuesday, December 11, 2012, 20:09
Posted by Anders
All material : 18mm plywood
Outer dimensions : 600x800x650 (WxHxD)
Example driver : B&C18TBX100

(for larger images, open image location in separate window/tab)

Drawing details :







Hornresp simulation data :








3 segment hornresp input and spl sim for compare only, please note that this is not a correct way of simulating this folding, regard it as en educational example, the top 4 segment simulation and subsequent graph results is far more accurate.


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