How do Danley speakers work? |
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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What plans? With 10db differences in characteristics?
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snowflake
Old Croc Joined: 29 December 2004 Location: Bristol Status: Offline Points: 3118 |
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some sort of slot loading in the throat I guess |
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_djk_
Old Croc Joined: 23 November 2004 Location: United States Status: Offline Points: 6002 |
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"some sort of slot loading in the throat I guess"
Search for 'cone correction' at DIYaudio. Danley prefers to use stock high-quality brand-name drivers so the user can find parts (diaphragms, re-cone kits) locally while touring. |
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djk
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toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
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There is some internal porting / re-tapping of the horn into other sections in a few of the boxes too. |
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kevinmcdonough
Old Croc Joined: 27 June 2005 Location: Glasgow Status: Offline Points: 3749 |
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Well it's not that there is NO difference, Danley is the difference. Years of experience, years of testing and refining and learning, years of multiple, multiple prototypes, years of refining simulation models and learning where the inaccuracies are and how to compensate for them, years of crossover design and component selection. Many of the DIY versions sound great of course, but don't approach the refinement of his designs. But yes, in essence if you read through all the posts on places like DIYAudio and Soundforums, especially the posts Tom himself has made, most of the knowledge is out there to get most of the way, and then a similar process of refining and testing to get to the point he is at, learning the tips and tricks and subtleties that set his speakers apart. k
Edited by kevinmcdonough - 08 August 2017 at 11:27pm |
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Hemisphere
Old Croc Joined: 21 April 2008 Status: Offline Points: 2272 |
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Great explanation thanks Kevin. I've been thinking about this a lot lately, about that ultra-rigorous approach to optimisation.
Some of the science involved at that level is so arcane, (and anyway the desired result is a pleasing sound, not strictly a scientifically perfect device), so the bridge between simulation and reality even with best practices is a shaky one. First get a solid grasp of the theory (and with boxes like Danley's that is no small task!), then get the tools necessary to apply it, then use those tools, over and over down every conceivable avenue, closing off the duds, refining the enhancements. If you're not on top of the theory then you won't even know where to look so you're just stabbing in the dark, but there's a lot to be said for that too.
Edited by Hemisphere - 08 August 2017 at 11:41pm |
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concept-10
Young Croc Joined: 17 May 2016 Status: Offline Points: 1292 |
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Spot on Kevin, I have built a couple of unities and a few tapped horns, they all sound good, however not as good as Tom's, he has spent years and a lot of money getting his to that level, it's easy to jump on his shoulders and get so far, but that last bit can be very difficult, Phill b on this forum has spent a lot of effort getting his to a very high standard, I have not heard them but have been told they are superb, as you say the information is out there it's just finding it all and putting it all together.
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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.
Edited by gen0me - 10 August 2017 at 1:12am |
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toastyghost
The 10,000 Points Club Joined: 09 January 2007 Location: Manchester Status: Offline Points: 10920 |
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Thought you might like this response from the man himself, which hit my inbox whilst I was at Boomtown
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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So line array isnt really a line array. Doesnt work like this:
It does work like this: |
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kevinmcdonough
Old Croc Joined: 27 June 2005 Location: Glasgow Status: Offline Points: 3749 |
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well technically its both lol.
At lower frequencies, the ones produced by the big cone drivers, similar to what Tom was saying the ideas is that you design them so that physically they're within 1/4 wavelengths of their neighbours (in practice, as close as can be gotten) and so they are supposed to combine together and travel from the array as a single source. So like your second drawing, you're hearing the product of many boxes together, combining in phase (hopefully!) At high frequencies, the wavelengths are too small combine like this, so it works a little more like the first drawing, with each box having a vertically narrow dispersion horn/waveguide for the HF and covering their own section of the audience. In practice, with the realworld never being perfectly in line with the theory, they both do a bit of both. Though the low frequencies are much more drawing 2, and the high frequencies much more drawing 1. K
Edited by kevinmcdonough - 15 August 2017 at 10:55pm |
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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Yes so it means where waveguides are not yet playing there will be mountains and valleys.
Different for different listeners. Also waveguides has different beamwidthes vertically on different frequencies Edited by gen0me - 15 August 2017 at 11:05pm |
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