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Corner Horn for TB W8-1772
Corner Horn for TB W8-1772
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Old 3rd November 2017, 10:50 AM   #1
Dietervsw is offline Dietervsw  Switzerland
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Default Corner Horn for TB W8-1772

Hello everyone,

I have a dilemma with my listening room: It is only 3.5 meters (11'6") wide x 5 meters (16'5") long.

It is small for a rear loading horn and I would like to have a high sensitivity horn for my SET 845 amp.

I have 2x TB W8-1772 speakers.

Hence the question: Would a corner horn solve the problem?

If yes, would the calculation be the same as a rear loading horn with the horn split in 2?
Ideally I would like the frequency response to be 30hz - 20khz (-3dB)

I have a CNC router, so the internal curves would not be hard to build.

Thanks and regards,
Dieter

Last edited by Dietervsw; 3rd November 2017 at 10:53 AM.
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Old 3rd November 2017, 03:06 PM   #2
hm is offline hm  Europe
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Default rdh20

i made a few solutions for such driver,
look RDH20 and Schalmei sat
Attached Images
File Type: jpg RDH20 TB1772 monacorSPH-210 web.jpg (128.9 KB, 395 views)
File Type: jpg schalmei_riethweb4.jpg (170.9 KB, 396 views)
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Old 3rd November 2017, 08:22 PM   #3
Dietervsw is offline Dietervsw  Switzerland
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Quote:
Originally Posted by hm View Post
i made a few solutions for such driver,
look RDH20 and Schalmei sat
Hello Horst,

thanks for the hints! I checked your website which is great!

I share your opinion in regards to X-overs

I am slightly more radical and would like to have point source, with only one driver.

Decware has a nice design, but only for 6,5" drivers
http://www.decware.com/CORNERHORNPLANS.pdf

A Tannoy corner horn, looks quite nice, but don't think that such a large box would fit my room.

The Voigt horn ist also nice, however it is way beyond my abilities to build.
retro vintage modern hi-fi: Voigt Domestic Corner Horn

Taking your principle of 2 drivers, would it be feasible to use one driver and have 2 horns front and rear loading? Like Lowther Imperator?

Thanks and regards,
Dieter
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Old 3rd November 2017, 08:54 PM   #4
planet10 is online now planet10  Canada
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Corner Horn for TB W8-1772
The TB W8-1772 is not super efficient, the ones i have had thru here have averaged just under 92 dB. A back loaded horn wil only increase the gain in the bass, potentially eliminating the need for any baffle step compensation.

SE 845, unless you want harm inducing SPL, should be more yjam enuff power for this driver in almost any box. It may well not be able to trptoduce all the low level information that your SET feeds it thou.

A horn for this driver would need to be specifically designed for the it.

dave
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Old 4th November 2017, 12:52 AM   #5
freddi is offline freddi  United States
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Corner Horn for TB W8-1772
I think the Karlonator8, which is tuned ~41Hz would work reasonably well (assuming your listening position is compatible with floor seated, up-firing highs)
http://i.imgur.com/tnbO9Yy.png
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Old 4th November 2017, 04:03 PM   #6
Dietervsw is offline Dietervsw  Switzerland
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Quote:
Originally Posted by planet10 View Post
The TB W8-1772 is not super efficient, the ones i have had thru here have averaged just under 92 dB.
dave
Hey Dave, what a rip off! They sell it as having 95dB SPL
Microdynamics would have been thankful for these extra 3dB, anyways, budget was short for a pair of Lowthers.

If some day I decide to "solder" a 300B, I will probably need other speakers.

Hey Freddi,

this is an interesting design, how should I understand the front panel blue line?
will it be another plywood in the front of the front panel or will it replace the front panel?

Thanks and regards,
Dieter
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Old 4th November 2017, 08:39 PM   #7
methodarn is offline methodarn  Russian Federation
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1772 not suitable for good horn. If you use in 10-16l horn chamber and 3m horn lengh you will get just 55-60hz then big dip then 120hz peak. I tried 1772 in jericho horn, it was a big mistake, its sounds horrible and boomy on 60 and 120hz... I put nirvana 6.5 in this horn with correction of chamber and horn throat . so it goes lower than 40hz without any dips and peaks, and you can hear any bass note. Actualy hornresp shows this very close to real. I also tried to silumate recomended TB horn and its looks poor than jericho horn

Last edited by methodarn; 4th November 2017 at 08:43 PM.
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Old 4th November 2017, 11:04 PM   #8
freddi is offline freddi  United States
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Corner Horn for TB W8-1772
hi Dieter - - regarding the Karlsonator8 drawing, the blue lines are an alternate aperture. I think it may be beneficial to extend the aperture all the way to the top but not have it quite as open or wide up there as with the blue lines.

Here's my tall 18" conventional Karlson-type with a narrow upper aperture. If I cover the first 8 inches from top - downwards, then it loses some subjective "speed" (why?)

http://i.imgur.com/kMwSfs1.jpg

here's the Karlsonator12 aperture - Karlsonator12 tunes to 37Hz, which
is too low for some drivers

http://i.imgur.com/I1YiIFW.jpg

here's a clip of that K18 with K-tube mounted inside the front chamber - thankfully, it sounds better in person
YouTube

Last edited by freddi; 4th November 2017 at 11:11 PM.
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Old 7th November 2017, 05:27 PM   #9
Dietervsw is offline Dietervsw  Switzerland
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Hello everyone,

many thanks for the suggestions and great discussion.

I have been simulating some cabinets in AJHorn and even the original TB horn suggestion does not seem to bring hifi results.

After simulating that jazz for a few hours, I came to the conclusion that with that driver a horn can only work with internal absorber, below you can find the simulation.
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Old 7th November 2017, 05:32 PM   #10
Dietervsw is offline Dietervsw  Switzerland
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