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omni-directional prometheus

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Posted on September 7, 2009 at 15:02:34
mamal
Audiophile

Posts: 9
Joined: April 11, 2007
 since i am very impressed how beautiful my prometheus reproduce the sound stage at the "sweet spot" and as i can not deny the very well spatial reproduction of the omni-directional speakers which the sweet spot is extended to almost entire listing room, i am very curious and wondering how could sound a combination of a "dipole" and "omni-directional" concept.

this is why i made a draft for my omni-directional-prometheus :-) and would like to test it.
has anybody tried that before?





you are welcome to comment the draft, build it, modify, optimize the shapes and dimensions and share your experiences and results.
i think the prototype can be done relatively cheap; the stand can be a plastic pipe/tube. the cone(s) has not to be made of wood; it can be made of cardboard and get filled with plaster or other solid materials.

any other ideas?
looking forward for your comments and suggestions

regards

mamal
RE: omni-directional prometheus, posted on October 26, 2009 at 07:24:29
Rocket 88
Audiophile

Posts: 3
Location: Mountain West
Joined: October 23, 2009
 Looks like something cool. When are you going to git a go?

RE: omni-directional prometheus, posted on October 29, 2009 at 02:28:56
mamal
Audiophile

Posts: 9
Joined: April 11, 2007
 i have already built and tested the first prototypes.
as expected, the spatial reproduction of the sound stage is impressive, however, an unwanted typical horn related sound coloration due to the cones can be heard. furthermore , the overall efficiency is reduced and the high frequency level is decreased. i can deal with some negative aspects of these omni-directional speakers, especially , because the resolution is still ok, but the sound coloration has to be corrected. if i have time i will experiment with the shape of the deflectors (cones) and tune the distances to the drivers. i am convinced that the coloration can be widely managed, since there are many reasonable omni-directional speakers available in the market, but considering my limited knowledge in building speakers and my available time as well as absence of a workshop, i am afraid that it takes me longer to do that :-) .
i will keep you informed about the progress if any ;-)

cheers
mamal

Looks like a great idea mamal! ....hope you build it, posted on September 10, 2009 at 08:55:23
Bas Horneman
Distributor or Rep

Posts: 3549
Joined: March 28, 2001
 and tell us what its like....oh...and are you going to build dipole subwoofers to go with them ;)
To infinity and beyond!!!
RE: Looks like a great idea mamal! ....hope you build it, posted on September 12, 2009 at 12:05:53
mamal
Audiophile

Posts: 9
Joined: April 11, 2007
 i would like very much to build it, however, my time for the hifi hobby is now very limited; i became father on 09.09.09 :-)
i hope also other interested poeple around (may be you?!! :-) ) have time and try it and share the results.
kind regards, mamal

Congratulations!....Father mamal ...., posted on September 14, 2009 at 07:20:11
Bas Horneman
Distributor or Rep

Posts: 3549
Joined: March 28, 2001
 My time for the hobby is also very limited...so you'll have to wait for someone else ;)

Kind regards,
Bas
To infinity and beyond!!!
RE: Congratulations!....Father mamal ...., posted on October 11, 2009 at 15:24:33
mamal
Audiophile

Posts: 9
Joined: April 11, 2007



hi bas, i have finished the first prototype this week. currently i am testing/measuring it :-) , i will post some first results soon.
regards
mamal
Wow you actually tried it!!!! Looking forward to hearing about, posted on November 5, 2009 at 02:58:20
Bas Horneman
Distributor or Rep

Posts: 3549
Joined: March 28, 2001
 your results.
To infinity and beyond!!!
RE: Wow you actually tried it!!!! Looking forward to hearing about, posted on November 5, 2009 at 11:59:14
mamal
Audiophile

Posts: 9
Joined: April 11, 2007
 hi bas! yes, I tried that :-) . the first results are briefly summarized in my early post ( http://www.audioasylum.com/forums/bastanis/messages/1003.html ). I hope I will find time to continue on this subject.

regards
mamal

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