OHm micro walsh series...

Ohm's own literature / info on their current line of speakers clearly states that these speakers are NOT omni-directional. They may sound more "diffuse" than other designs though due to the lack of direct radiation from the inverted mid-woofer. Other than that, the only "Walsh" driver that i know of that would fit inside of one of those "mesh cans" would be a Walsh tweeter as used by Infinity back in the 1970's.

As to the Morrison's, they are based on Stuart Hegeman's designs. The manner that the woofer is loaded within the cabinet is different from any other design that i've seen. The easiest way to describe it would be to think of a combo transmission line design mixed with internal Helmholts resonators. This approach has a LOT of potential from what i can tell based on the limited reading i've done about it. Sean
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Last spring, I ended up getting a pair of micro talls, the matching center channel, and Ohm satellites for my home theater system. The wide soundstage and 3D sound of the talls are great for movies and the center channel is superb.
I listen to music through them often and it always surprises me how loud those little micro talls can play.

A couple of other manufactures that make nice omnis....

http://www.cd-konzert.com/loudspeaker.htm
http://www.german-physiks.com/
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This is out of Ohm Walsh loudspeakers Technical White Paper dated 1981.
((The engineering of single wide-range drivers, such as the original Walsh loudspeaker driver, entails trading off efficiency for bandwidth. Perhaps the single most important compromise is the voice-coil mass decison. A coil, large and heavy enough to provide efficient bass responce, will not provide adequate high-frequency range. Conversely, a low-mass coil with excellent high-frequency performance will not be able to generate large low-frequency excursions. So, while the OHM F is the ultimate embodiment of Walsh technology, it requires substantial power to achieve loud sound pressure levels. Also, while the 360-degree dispersion of the Ohm F produces remarkable stereo imaging., it requires rather careful placement in the listening-room. The Ohm Walsh Loudspeakers utilize unconventional technology to provide a less expensive speaker which is substantially more efficient and less critical of room placement, but still coherent over a wide listening area.))
They are NOT omni, so it must be the coherent sound over a wide listening area is why I like them.
We took our drapes down and replaced then with verticals and also took down 64 sq' of old SONEX that was falling-apart and now the room is too lively for my taste; I have to do something about that.

The use of the word "coherent" in this specific sentence may not be the most appropriate word for what they are trying to describe: "The Ohm Walsh Loudspeakers utilize unconventional technology to provide a less expensive speaker which is substantially more efficient and less critical of room placement, but still coherent over a wide listening area. By that, what i'm trying to say is the sound produced by such a design is NOT coherent so much as it is "equally diffuse".

While some may wonder how the sound radiating out of the rear of a mid-woofer combined with a forward firing tweeter could be "equally diffuse", that is simple. All of the sound that one hears is "leaked" through all of the holes in the metal canister and the material that lines the inside of that "cage". As such, the "beaminess" of the tweeter at higher frequencies is nullified due to all of the diffraction / internal reflections taking place. The end result is that one hears the sound eminating through the holes in the canister, not from any single driver. There is no direct radiation, hence everything is "equally diffuse", which is the opposite of providing a point source of radiation that exhibits a "coherent" wave-front. Sean
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