for my part I really don't know
in fact (perhaps I have already told the story somewhere above) I tested three versions of back-to-back boxes, the first was just just 13 cm wide, the next 23 cm and the last was 70 cm wide
the first one was a complete failure, the second and third performed similarly, the latter was better all-rounder (no wonder as it had some stereo spread inbuilt)
(but note that in my boxes each speaker worked in separate enclosure therefore Radugazon theory doesn't apply anyway - correct or not)
as I also reported before in this thread, I once had opportunity to examine Grundig "Space Fidelity" speakers section
it was horizontally placed aluminium alloy tube about 70 cm long with small about 10-cm midbass drivers pointing to the sides (monophonic sub was separate) and small dome tweeters also pointing to the sides but slightly toed-in towards listener
the two midbasse shared common volume (the tube was not divided in two) but there was a kind acoustic resistance "thing" in the middle between them, of fine tubes type
whole "Space Fidelity" music system as such was an awful ugly junk BUT the speaker section worked (in terms of spatial reproduction of sound) as advertised and very like my back-to-back boxes
links to patents here: http://www.diyaudio.com/forums/multi-way/10962-stereolith-loudspeakers-question-12.html#post1635171
therefore I remain unconvinced so far WRT the critical character of this 17 cm distance requirement
but of course I have no real understanding and have conducted only pathetic amateurish listening tests, so I'd better shut up 🙄
best,
graaf
Right markus (post 239), what has to be considered is the difference of path.
It's maximum is as said 21.6 cm for a source at 90°, but music comes usually from
a frontal zone under smaller incidences, and still smaller if we listen to a single stereo device, as the stereolith.
I think that Walter S took it's 17 cm value from these considerations.
Now is it relevant ? Relevant of what? I would like to know.
It's maximum is as said 21.6 cm for a source at 90°, but music comes usually from
a frontal zone under smaller incidences, and still smaller if we listen to a single stereo device, as the stereolith.
I think that Walter S took it's 17 cm value from these considerations.
Now is it relevant ? Relevant of what? I would like to know.
Ahem, I have to punish myself for emitting a wrong statement 
you see that:
It's incorrect, but after all it's a good new.
Of course, this "sharp impulse", negative because coming from the driver (A) and measured through the cone of the disconnected driver (B) will still exist when the driver (B) will be connected (even after some constructive or destructive interferences)
So we have an embryo of XTC.
sometimes I wonder if I don't have to go to the BIYaudio* forum
*(BIY = Buy It Yourself)
you see that:
Me too till I realized that this cheerful signal was now in phase and then no more free XTC
It's incorrect, but after all it's a good new.
Of course, this "sharp impulse", negative because coming from the driver (A) and measured through the cone of the disconnected driver (B) will still exist when the driver (B) will be connected (even after some constructive or destructive interferences)
So we have an embryo of XTC.
sometimes I wonder if I don't have to go to the BIYaudio* forum
*(BIY = Buy It Yourself)
Stereolith will be arriving in my lab pretty soon. Anything special you guys want to get tested?
Autopsy !
Markus, I have a plan :if WS is here, serve him a lot of drinks, soon he will have to go to the toilets. Then, close the door from the outside. When he will start to call for help, make noise and pretend searching some tools, but open the damned box and clic clic. Once it's done, then make WS free. Easy.
Markus, I have a plan :if WS is here, serve him a lot of drinks, soon he will have to go to the toilets. Then, close the door from the outside. When he will start to call for help, make noise and pretend searching some tools, but open the damned box and clic clic. Once it's done, then make WS free. Easy.
great plan! I have even better - more knightly! just kill the dragon and take his gold!
audaces fortuna iuvat! 😀
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Damned, he bought it !
So bye bye warranty if opened.
NP, markus, there's the X-Rays, can work with a long exposure.
Please ask a cliche for each face. 😎
So bye bye warranty if opened.
NP, markus, there's the X-Rays, can work with a long exposure.
Please ask a cliche for each face. 😎
lifesize inflatable one with red flashing L.E.D. situated on the forehead comes as an accesory 😛
It's hard to believe he was converted from the gedlee sect! 
😀 Maybe this will give hope for others too. A start of a new era 
- Elias
😀 Maybe this will give hope for others too. A start of a new era - Elias
Radugazon is the stereolitic tests specialist
for my part I would like to read a report from listening tests in various placement configurations - in a big room, in a small room, in a middle of the room, in a corner, against a long wall, against a short wall, symmetrically, asymmetrically, in a relatively live room, in a relatively dead room, relatively close to the speaker, relatively away from the speaker, from the next room, outdoor if possible etc.
I think it would be funny if it was actually operating as a (semi) dipole. 😀 (..as sort of a high freq. mid-side setup.)
but first it would be really great if it was actually operating (as advertised) at all! 😀
because it is possible that our experiments are indeed different and original Stereolith is just a great inspiration but as such it is piece of junk...