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TH-Mini - tapped horn - by Danley Sound Labs |
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wafflesomd 
Young Croc 
Joined: 21 September 2007 Status: Offline Points: 811 |
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 Posted: 24 June 2009 at 5:48am |
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Looks amazing.
If these are quality and worth the money, I just might build some.
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Ibex
Young Croc
Joined: 27 May 2009 Status: Offline Points: 1013 |
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Posted: 24 June 2009 at 8:09am |
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TDA is right, the original Staiper Design is loaded with a 18" driver!
 I'will go into the matter, maybe it's sufficient to resize the cab a little bit as TDA has done with his 12" version...
 black = B&C 12TBX100
grey = B&C 12NW100 Edited by Ibex - 24 June 2009 at 8:10am |
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Ibex
Young Croc
Joined: 27 May 2009 Status: Offline Points: 1013 |
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Posted: 24 June 2009 at 8:15am |
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I think it's not nessesary to resize...
  black = B&C 15TBX100
grey = B&C 18TBX100
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Deadbeat
Old Croc 
Joined: 12 March 2008 Location: Singularity Status: Offline Points: 3167 |
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Posted: 24 June 2009 at 4:48pm |
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Bigger speaker don't mean better, if you remember how the tapped horn works from the whitepapers (and look at TD's designs in speaker size as compared to volume etc).
Remember, if you do a quick search, it has been found on this and other forums that tapped horns are less efficient than they sim.
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Away on extended leave.
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Ibex
Young Croc
Joined: 27 May 2009 Status: Offline Points: 1013 |
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Posted: 24 June 2009 at 9:23pm |
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Yes, I already read about something like that, but if we can trust the measurements of TDA, then the simulation has less sensitivity as measured...  greez |
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_djk_
Old Croc
Joined: 23 November 2004 Location: United States Status: Offline Points: 6002 |
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Posted: 25 June 2009 at 2:34am |
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Some people at DIY audio have found their TH projects to measure more efficient than the simulations. Some found less, but it is questionable as to whether they built it close to the design, and whether the construction was sound (one guy just screwed it together with no glue!).
The TH requires different drivers than what most people here are used to buying. A driver suited for a FLH will not do well in a TH design.
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djk
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wafflesomd
Young Croc
Joined: 21 September 2007 Status: Offline Points: 811 |
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Posted: 26 June 2009 at 7:02am |
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I slightly more comprehensive plan to the 12" would be wonderful.
Unless I'm dumb and can't seem to figure out what you mean by simply descreasing the cabinet height. What about the internals?
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Ibex
Young Croc
Joined: 27 May 2009 Status: Offline Points: 1013 |
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Posted: 27 June 2009 at 10:41am |
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I know, the original staiper plan is not the most comprehensive. You could import the picture with AutoCAD and measure each panel out. Maybe I make a better plan with all the dimensions needed. Outer dimensions of one 12" cab would be 800x600x380mm (18" version: 800x600x626mm) greez |
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Ibex
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Joined: 27 May 2009 Status: Offline Points: 1013 |
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Posted: 27 June 2009 at 11:15am |
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Hi _djk_, what parameters would a th suited driver have? You made a version of a modified folded version of the stepped horn with the 12.00SW. Isn't the ciare the wrong driver for such a th construction, because of his peaky HR response? I made the experience that drivers with an heavy wighted cone have such mint response peaks. All I know is, that fs of an th suited driver should be optimum 1.414 times higher than the cut-off frequency of the th design. Is there a optimum EBP for th drivers given? Are simulations of a th design in combination with a non suited driver less consistent with the real measurements? greez |
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_djk_
Old Croc
Joined: 23 November 2004 Location: United States Status: Offline Points: 6002 |
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Posted: 27 June 2009 at 9:50pm |
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"what parameters would a th suited driver have?"
They seem to work better with higher Fs and mid-value Qts drivers. It seems as if the lower the Qts the closer the driver needs to be near the ends of the TH. I look for suitable T/S parameters and then plug the numbers into an AkAbak design and then juggle an existing design and see what happens.
"You made a version of a modified folded version of the stepped horn with the 12.00SW. Isn't the ciare the wrong driver for such a th construction, because of his peaky HR response?"
The design I did for the Ciare was tough to make reasonably flat, it's better suited to a bigger TH going much deeper than most people would need.
"All I know is, that fs of an th suited driver should be optimum 1.414 times higher than the cut-off frequency of the th design. Is there a optimum EBP for th drivers given?"
The TH isn't really a horn in its normal operating passband. The EBP of the driver is only of interest to make sure the mass corner (2x the EBP) is above the desired HF cut-off point.
"Are simulations of a th design in combination with a non suited driver less consistent with the real measurements?"
Don't know, suspect the sims are reasonaly correct (as long as your build is correct).
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djk
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MarjanM
Old Croc
Joined: 10 February 2005 Location: Macedonia Status: Offline Points: 7816 |
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Posted: 28 June 2009 at 2:03pm |
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I have been away for a few weeks so pardon me but, where is the original post where Stipe posted this plan? |
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Marjan Milosevic
MM-Acoustics www.mm-acoustics.com https://www.facebook.com/pages/MM-Acoustics/608901282527713 |
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Ibex
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Joined: 27 May 2009 Status: Offline Points: 1013 |
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Posted: 28 June 2009 at 6:11pm |
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I have no idea, I'm also interested in the original post. I have the plan from the following treads: http://www.speakerplans.com/forum/staiper-design-for-learning-hornresp_topic24297.html http://www.diyaudio.com/forums/showthread.php?threadid=139136 greez |
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TDA-Audio wrote: