H frame/ Dipole/U frame ???????? - Page 2 - diyAudio
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Old 21st September 2005, 03:58 AM   #11
AJinFLA is offline AJinFLA  United States
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Vifa XT-19 http://www.d-s-t.com/link/vifa/data/XT19TD00-04a.htm

Seas W22EX http://www.seas.no/PDF%20data%20exce...EX001E0022.pdf

Peerless XLS12 http://www.d-s-t.com/link/peerless/data/830500.htm


Cheers,

AJ
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Old 22nd September 2005, 05:28 AM   #12
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Dear AJinFLA,

Thank you,

M
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Old 22nd September 2005, 09:04 AM   #13
icebear is offline icebear  Norway
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Default V-split dipole

Hi

I have been fooling around with dipole woofers for some time, and tested a lot of prototypes. H, W, ripole, linkwitzbox ++

The last one I tried is a Vertical split system. (Norwegian Pat nr. 166989)
It combines the Karlson box and Vertkal split teory. Add a plate in front of the driver, and it will gain a pressure. The pressure will hold better than just the motion from the driver. You will also gain a correct impulseresponse.

Click the image to open in full size.
Click the image to open in full size.

I must say that the result is better than without the split (only W-baffle), and i had to turn down the 6 dB compensation. I'm now running witouth compensation, and it working fine ( And I'm just running one at the time )

rgds
Bjorn
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Old 22nd September 2005, 10:39 AM   #14
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(JPK) You migh also want to look at the first 3 articles in my Tech section, http://www.musicanddesign.com/tech.html The U-frame atricle looks at both U and H frame woofer and addresses the need for damping in the U-frame. The crossover article looks at how the radiation pattern varies through the crossover region when different types of sources are corssover over, i.e, monopole yo cardioid, dipole to monopole, etc. The room gain article discusses room gain for dipole, monopoles and cardioids.
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Old 22nd September 2005, 12:57 PM   #15
AJinFLA is offline AJinFLA  United States
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I didn't forget you John, your site was the first link in my original reply
But what to make of the pic above your post? The Karlsonpole? Resonance anyone?
At least I like his wood working skill and craftsmanship. That looks a lot like mine.

Cheers,

AJ
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Old 22nd September 2005, 01:00 PM   #16
icebear is offline icebear  Norway
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HEY!!!

It's just a prototype
(I hope)

b
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Old 22nd September 2005, 02:01 PM   #17
AJinFLA is offline AJinFLA  United States
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My finished ones look just like that


cheers,

AJ
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Old 22nd September 2005, 10:19 PM   #18
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Default Vertical Split Theory

Icebear,

Have you read that patent? (is it Forsman's?)
If so, could you please give us an idea of what it's about?

Thanks,
Pete McK
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Old 22nd September 2005, 10:38 PM   #19
freddi is offline freddi  United States
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hey icebear - way cool - does your proto's wings flex much? - I run Karlson at 400 watts nearfield and wings can sing - haha

hows your dipole Karlson sound on drums, strign bass and pipe organ stuff? - how about techno/hiphop?

funny thing running wideband Karlson - small changes in flare,gap nd initial slot area produce subjectively large changes in timbre (and sometimes subjective extension) besides altering Z curve. perhaps choking down area in the tight portion of slot does some change in direct - indirect energy (from top half of chamber) that won't show up on mic - and maybe wave release rate. these variable3s give a lotta leeway on adjusting tonality.

did you look at Reams Karlson-hypex patent?


Robert W. Reams US 4196790 filed 1978 ďAcoustic Transducer having Multiple Frequency ResonanceĒ

http://home.earthlink.net/~buddhaboy2/RM/H.jpg

here's my little 18" k-toy

http://home.earthlink.net/~buddhaboy2/13.jpg
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Old 23rd September 2005, 11:05 PM   #20
freddi is offline freddi  United States
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Hi Bjorn - forgot to ask- are running both drivers? - what's parameter and K-dipole enclosure details?

Freddy
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