Klason & Strange, folded basshorn, acient design ? - Page 6 - diyAudio
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Old 11th May 2013, 12:04 AM   #51
Ivo is offline Ivo  Netherlands
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Quote:
Originally Posted by sonomanie View Post
i found this in an old dutch book
Hello Sonomanie, thanks for that. I can read German, but have always wondered if I interpret Klinger's remarks correctly. Now I can check in my mother tongue.

The text says in the first lines that the driver is coupled to the horn in the same way as in a Klipsch horn. I would interpret that to mean that it's a frontloaded horn with a back chamber. It also says that the space below the cabinet is part of the horn expansion. OK, so far so good. But later on, the text says that if the enclosure is placed directly on the floor, it functions as a sealed box of 45 liters. Now, if it were a frontloaded horn, putting it directly on the floor would simply close the hornmouth and no sound would come out. I guess it is a backloaded horn after all. I read as much on a German forum, but could not really follow that part of the discussion. There is an updated version of this horn (still for 10" driver) that was updated to frontloaded horn (the RT1 simulated in the links I gave).
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Old 11th May 2013, 09:52 PM   #52
tb46 is offline tb46  United States
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Hi Ivo,

Post#51: "...I guess it is a backloaded horn after all."

You would have to leave out board #2 (Post #47) to open up the backchamber of the horn to the room.

Regards,
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Old 12th May 2013, 04:29 PM   #53
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Quote:
Originally Posted by whgeiger View Post
Sans English version.
Hi Bill,
Thanks for the link. I can get to that site but I don't see the forum anymore.
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Old 5th April 2015, 03:45 PM   #54
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Default RT-3D Ceneterbashorn

Quote:
Originally Posted by AKN View Post
Nice, I'm looking forward to se the RT2 12" version as well.
Designed for a 10 inch speaker with a resonant frequency of approximately 30 Hz. e.g. Coral 10F-60 or JBL LE10 or the like. Hornets cap is an important part and extension of the horn. The horn must be able to deliver straight down to 20Hz and below this at higher input power. Appropriate sharing is active crossover separate basdriver 12db at about 70-100 Hz subdued level with the side systems I use two Coral Beta 8 Full Range Speaker topped each with a JBL 075-sharing is already at 4000 Hz. (drawings is in centimeter )
All 22 pieces:
on the list!

All the 22 pieces:
1 / 2st 125x60 cm
2 / 2st 121x30 cm (front & back)
3/1 PCS 31x30 cm
4 / 2p 60x30 cm
5 / 2p 47.5x30 cm
6 / 2p 4x30 cm
7/1 pcs 30x30 cm
8 / 2p 14x30 cm
9 / 2p 13.5x30 cm Phased *
10 / 2p 32.5x30 cm
11 / 2p 23x30 cm
12 / 2p 18x30 cm

13 / 1st 5x5x20 cm (base stick)
14 / 1st 33x20 cm (base)
15 / 1st 35x20 cm (base)

16 / 2p 2x2x30 cm (frame to our Chamber.)
17 / 2p 2x2x118 cm "
18 / 2p 5x5x52 cm (back bone).

19 / 2p 9x30 cm Phased * 45 gr ends.
20 / 2p 11x30 cm Phased *
21 / 2p 6x30 cm Phased * 45 gr ends.
22 / 2p 16X30 cm Phased *
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Click the image to open in full size.Click the image to open in full size.Click the image to open in full size.Click the image to open in full size.
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Old 5th April 2015, 06:43 PM   #55
DrBoar is offline DrBoar  Sweden
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There where two Swedish iterations of the horns using 12" drivers one of similar size and one slightly smaller.
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Old 5th April 2015, 07:59 PM   #56
AKN is offline AKN  Sweden
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Quote:
Originally Posted by Rockolgas View Post
Designed for a 10 inch speaker with a resonant frequency of approximately 30 Hz. e.g. Coral 10F-60 or JBL LE10 or the like. Hornets cap is an important part and extension of the horn. The horn must be able to deliver straight down to 20Hz and below this at higher input power. Appropriate sharing is active crossover separate basdriver 12db at about 70-100 Hz subdued level with the side systems I use two Coral Beta 8 Full Range Speaker topped each with a JBL 075-sharing is already at 4000 Hz. (drawings is in centimeter )
All 22 pieces:
on the list!

Click the image to open in full size.
Very nice build!

Quote:
Originally Posted by DrBoar View Post
There where two Swedish iterations of the horns using 12" drivers one of similar size and one slightly smaller.
Yes,
Swedish magazine Radio & Television presented the RT-2 (big) and RT-3 (small) back in 1978. RT-1 (above) appeared in Radio &Television 1975. Originally RT-1 was called RT-Hornet but the name was retrospectively renamed to RT-1when the two new horns came out.
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Old 7th April 2015, 10:29 AM   #57
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Question Bashorne Speaker choioce

Anyone have advice on a 10 "speaker that would work well in a 3D bashorns contexts. A resonance frequency of approximately 30 Hz is recommend by the designer
but there are views to the engine power of the speaker should be around 14 or better ...
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Old 9th April 2015, 12:39 PM   #58
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Quote:
Originally Posted by Empee View Post
Hi all,


Anyone got any experience with this old design ?

The stand (the triangle) is actually part of the horn,
it stands in front of the hole in the bottomplate.

It's supposed to go from 30Hz up to 300Hz.



Cheers,

Empee
... and intersection of the adjoining back wall and floor constitute extension of the horn to make the low 30 Hz. limit possible.

WHG
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Old 9th April 2015, 01:12 PM   #59
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Yes , It sounds great upteted in 18MM MDF board , You can experiment with different attenuations and other elements, the baby is calculated for an element with Fs around 30Hz, below - Proposed is at 21 Hz so it may be appropriate to get up a little by filling up the back cover, and reduce the enclosure volume slightly larger frame might as well tougher damping. http://www.hifikit.se/images/4323/26w-4558t00.pdf
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Old 9th April 2015, 01:14 PM   #60
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Quote:
Originally Posted by Rockolgas View Post
Anyone have advice on a 10 "speaker that would work well in a 3D bashorns contexts. A resonance frequency of approximately 30 Hz is recommend by the designer
but there are views to the engine power of the speaker should be around 14 or better ...
Thisone should work fine after making the chamber behinde some smaller http://www.hifikit.se/images/4323/26w-4558t00.pdf
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