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Acum este Joi Mar 28, 2024 11:25 pm


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 Subiectul mesajului: Interesting design...
MesajScris: Sâm Dec 03, 2005 11:15 am 
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While I was searching the internet for papers about Horns, and other related info, I came across this:
http://www.danleysoundlabs.com/SH50.html

Might worth investigating...

I would be verry curious of What is happening inside....

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MesajScris: Sâm Dec 03, 2005 11:26 am 
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ha ha... this is the danley unity horn to which i referred earlier. if you have never seen it, check out the goodies on servodrive.com which is the website of sound physics laboratories, the company tom danley used to work for.

most particularly, feast your eyes on this, then think how much it solves all the problems, arrays correctly, increadible power density, is tiny etc... then realise that we don't stand a chance of working out how to model it and that it is probably patented up the arse. but they are amazing.

james.


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MesajScris: Sâm Dec 03, 2005 11:45 am 
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ah , crap, !
there's no way in hell I can can model something like that....let alone get some 5" midrange drivers.

Ah, well, back to the drawing board... :)

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MesajScris: Sâm Dec 03, 2005 11:58 am 
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After looking at it more closely, there's nothing verry special to it :D

there's a single flare used by both the mid and high frequency drivers.

The midbass section is actualy a 4 th order bandpass, nothing special, they're not even horn loaded (thus the 100dB SPL @1W)

later edit

midrange ideea cuuld be interesting (we could stick a pair of eminence close back mid drivers to the sides and obtain a coaxial horn)

midbass section still hangs in the air dough :roll: , because what they have there is not horn loaded :twisted:

Imagine

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MesajScris: Sâm Dec 03, 2005 12:52 pm 
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Imagine

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MesajScris: Dum Dec 04, 2005 5:29 am 
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the unity horn thang came up on speakerplans not so long back. quite aside from the matter that it is a totally proprietary technology that will be patented up the arse, did you have any way of working out how far from the throat and how big the holes need to be?

unity horns are cool as daddy-oh, but i'm not sure how much mileage there is in the concept for our use.

james.


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MesajScris: Dum Dec 04, 2005 9:34 am 
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james, ind.st scrie:
did you have any way of working out how far from the throat and how big the holes need to be?


well I should be able to moel the holes as throats in hornresp, and I,m sure that they have to be positioned as far back as posible , closest to the HF driver.

About the midbass section, that's easy it's just a 4th order bandpass with 18mm deep ports, but i could be preety tricky because I suspect some custom drivers... (altrough not such a big surprise really :lol: )

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MesajScris: Dum Dec 04, 2005 4:07 pm 
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Tom Danley gave quite a lot of info on how these worked on AA forum quite a while back in a long argument with Wayne Parham - short of revealing specifics though. Not only is the positioning of the holes critical to its operation, the size, shape and depth of the holes is also significant. Many people on various forums have had a play with the design, but without knowing as much about accoustic theory as Tom, the resulting trial and error experiments are staggering.

I think Tom had mentioned the lo-mid did benefit from some additional loading, and it would appear the new version has had a bit of attention in this area.

Cheers
Graeme


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MesajScris: Dum Dec 04, 2005 4:59 pm 
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Tom Danley gave quite a lot of info on how these worked on AA forum


Please give me the adress of that forum :shock:
this seems to be great bed time reading :wink:

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MesajScris: Lun Dec 05, 2005 2:58 am 
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Here is a link to one of the more informative and long running posts on the Unity on that forum back in 2002. There are others if you do a search of the main site.

Cheers
Graeme


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MesajScris: Lun Dec 05, 2005 6:23 pm 
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thank you verry much for the link

from what I have read until now, the design seems to be less appealing.

It's farr too complicated, and there are far too many things that can go wrong.

maybe in the not so distant future, I'll give it a try, but I now know that there is a huge amount of know-how involved in the design.

back to our horns then :roll:

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MesajScris: Lun Dec 05, 2005 8:03 pm 
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i was looking for some of those threads but couldn't find them, cheers graeme. yeah, as you have probably gathered i don't reckon that we will get very far with ripping off the unity horns, which is a shame, but for exactly the reasons you give. what we need is our thomas to have an unusually benevolent and patent defying moment and go open source with the bespoke nasa modelling software (not to try and suggest that the man that gave so much of his time to the lab subwoofer project etc is anything but benevolent, but you get what i mean).

james.


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MesajScris: Lun Dec 05, 2005 8:15 pm 
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studiyng the unity horn in detail, something does not look right.

The sensitivity is not as high as it should be (horn loaded)

I understand that the driver starts dropping above 2 Khz because of the geometry of the horn, I may have understood wrong, but if this is real, the design will not be able to give us the SPL, we need

Anyway even if the patent holder would give us the details, we would be discouraged because of the lack of suitable drivers., as all the drivers used in the unity horn except the 1" driver should be custom made.

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Telefon: 0766332366
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