TH-Mini - tapped horn - by Danley Sound Labs |
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TDA-Audio
Registered User Joined: 11 February 2005 Location: Russian Federation Status: Offline Points: 294 |
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yes! Long way "driver 1" = Long way "driver 2" |
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horns plans http://photofile.ru/users/tda-audio/
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bitzo
Registered User Joined: 20 November 2007 Location: Italy Status: Offline Points: 977 |
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brilliant! keep us updated, sound very interesting.
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FlipC
Young Croc Joined: 25 October 2007 Status: Offline Points: 654 |
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I will wait on the math of that TDA.
See a few issues. Negative taper at mouth. Cancellation of the reverse wave and the forward wave. Doable but not with that exact layout. Have you built and measured your 12" version TDA? Also do you use a CNC ? |
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510
Registered User Joined: 22 September 2009 Location: jamaica Status: Offline Points: 41 |
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FlipC
Young Croc Joined: 25 October 2007 Status: Offline Points: 654 |
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So you built one with this layout ?
If so please post pic and some data. If you built the single 12" you miss understood. (though still post some pics!) I was referring to the dual layout he has in the pic posted above. 90 degree's isn't anything at low freq. but 180 without anything to tell it to go 180 is another story. TDA - where you at? You using a CNC or what? |
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TDA-Audio
Registered User Joined: 11 February 2005 Location: Russian Federation Status: Offline Points: 294 |
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steck powered by B&C 12tbx100 high pressure in stack band singl 48 hz steck 40hz |
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horns plans http://photofile.ru/users/tda-audio/
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darkmatter
Old Croc Joined: 26 February 2005 Location: LDN Status: Offline Points: 2425 |
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Are any of these a definite problem though? Seems like resonances would be smoothed by using two horns of very slightly different dimensions. Distortion peaks might also be wider but smaller. Might not be an absolutely optimal layout but I don't think there'd be serious issues. For tapped horns a push-pull configuration seems to make more sense. Reduces distortion, smooths BL curve, and with the right sort of loading might help keep the drivers intact at high excursion. |
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Jason kiDD
New Member Joined: 21 August 2009 Location: NYC Status: Offline Points: 3 |
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Tda when you get a chance see if you can get some plots done on the Mini-12 stecks.. I like the layout! Thanks..
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TDA-Audio
Registered User Joined: 11 February 2005 Location: Russian Federation Status: Offline Points: 294 |
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15" version |
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horns plans http://photofile.ru/users/tda-audio/
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mmetro1990
New Member Joined: 25 June 2009 Status: Offline Points: 3 |
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What is the dimensions of the 15" version? ^^
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martinsson
Registered User Joined: 19 June 2007 Location: Sweden Status: Offline Points: 325 |
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Nice ! Really impressive, is the design open to the public to take part of on these boxes ?
(sorry just saw the link, never mind).
I have a thought, or maybe more of a question when looking at the picture above, regarding the initial chamber, cone side, how did you manage the risk for compression distortion due to a what seems like to narrow S2 surface area when operating at higher levels, it seems borderline to small ? (but i'm sure you have thought of this).
The rule of thumb goes something like S2=0.5xsd, but this is not carved in stone so to speak, and it is also driver dependent, i also think this may influense the designs tolerance towards what drivers can be used in it.
My reson for asking is that this was of great importance to me, and it is one paramteter that has alot of followers in the logic of tapped horn design, a smaller S2 surface area may open the door for a more compact design all togheter.
again, really nice, thanks for sharing. Edited by martinsson - 09 November 2010 at 6:15am |
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Swedish Pro-fi diy-nerd - http://www.martinsson.cc/blog/
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