3D Spiral Horns Anyone?

[jkeny]

Has anyone tried these enclosures - 3d spiral Horns? http://www3.ocn.ne.jp/~hanbei/eng-intro.html
Looks like an interesting build & a way to keep the boxes small while gaining the benefit of something like a Transmission Line speaker - but how do they sound?

I'm looking to use some Jordan JX92S drivers

[jkeny]

Ok, so nobody has tried them - that doesn't usually stop people having an opinion, lol

Has anybody tired something similar? Would this idea work as a good quality transmission Line - any technical reasons against this?

I'm new to speaker building & have a pair of Jordan JX92S drives & wanted something that had the bass level of a GM MLTL but was less intrusive!

[Pano]

The subject comes up from time to time.

But I've never heard of anyone in the West who's built them.

[Aengus]

jkeny said:

...that doesn't usually stop people having an opinion...

Absolutely true - I have two of them (opinions). One is that I love the way the cursor works on that site ; the other is that they look fascinating, especially the plexiglass version. I have a pair of the JX92Ss I'm still thinking about a home for - let me know if you think of trying these, perhaps we can share experiences*.

I must say I find the site a bit confusing to navigate - there's no easy way to differentiate the more recent designs from the older ones, and (worse), as far as I can see, there's no indication of which variation is - in the opinion of the originator - better or worse than any of the others. What is your take on this?

Regards.

Aengus

*Only if you are very patient, though - I am a slooow builder.

[jkeny]

Panomaniac, Why has no one built them? - is the design flawed in some way? Can you give me a link to previous discussions (I can't find anything in search)

Aengus, I agree about the site - hard to tell which is best but I emailed the guy & this is what he replied:

Thank you for your interest to a 3D spiral speaker.

I have no experience of Jordan JX92S, which is too expensive for me.
The best matching design for JX92S may be AG180M.
http://spiral1075.hp.infoseek.co.jp/...ng-ag180m.html

Best regards,
Masaaki Takenaka

What do you think - is it worth a go? I need some opinions from experienced speaker builders as to the chances of success! Glad to share experiences if you wish to go ahead!

[Pano]

"Why has no one built them?" Good question!

Maybe too labor intensive for an unknown technology?
I've looked at the site for years, but never built. As the site grows, it gets harder and harder to figure things out. (as noted above)

I have heard some amazing little speakers that had way more bass than they should have. Used a "proprietary waveguide" inside the box. Port was too small for the spiral stuff, tho.

So it is possible.

Guess you have to decide if you want to take the plunge and find out if you're going to start a new trend here on diyAudio.

[tinitus]

I find only the later ones with diagonal inner bafles interesting...problem is that all the designs seem rather accidental

[mightym]

looks interesting, Yes.

However, remember good/bad, right/wrong. The Japanese tend to prefer a different type of bass to the average American.

One of the Fostex designs detailed on his site I theik with an fe 166, HE labeled his best yet then lined it out?

There is a thread over on the Lansing forum where a DIY'er built an ersatz Altec with some old woofers, and new compression driver for an old horn, he built a spiral horn with help from this gent.

I'm sorry I don't remember the title to the thread, ( may have been "ersatz Altec"?).

I'm trying to design a box and keep hitting results from the various and available box design prog's that I don't understand, too bad I studied business instead of physics....

John

[jkeny]

Hey MightyM, do you have a link to the Lansing Forum - can't seem to find it?

[Brett]

Originally posted by jkeny
Hey MightyM, do you have a link to the Lansing Forum - can't seem to find it?

This what you meant?

http://audioheritage.org/vbulletin/index.php

I can't find the thread though with the obvious search parameters.