H frame/ Dipole/U frame ????????

[AJinFLA]

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

[mefistofelez]

Dear AJinFLA,

Thank you,

M

[icebear]

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.




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

[john k...]

(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.

[AJinFLA]

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

[icebear]

HEY!!!

It's just a prototype
(I hope)

b

[AJinFLA]

My finished ones look just like that


cheers,

AJ

[PeteMcK]

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

[freddi]

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 “Acoustic Transducer having Multiple Frequency Resonance”

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

here's my little 18" k-toy

http://home.earthlink.net/~buddhaboy2/13.jpg

[freddi]

Hi Bjorn - forgot to ask- are running both drivers? - what's parameter and K-dipole enclosure details?

Freddy