Sean, I purchased my first pr. of OHM WALSH on Nov.3 1987, the 4-XO's. A Technical White Paper came with those speakers to explain too the purchaser how they operate and here is what it says in part....
This cone is fabricated of special materials which have a super-sonic velocity of sound propagation. By engineering the cone angle and propagation velocity properly, a coherent, cylindrical sound field is synthesized in the air around the cone; the listener, in fact, receives simultaneous sound.
As described previously, the apex of the cone is initially dent, and a sound-wave originating at the apex moves into the air at 1100 feet per second. Similarly, every point on the cone contributes its output at exactly the right time for ALL the wavelets to coherently merge into a cylinder, as shown in Figure 3. Wherever the listener sits, all the sound produced by one pulse reaches the ear at the same instant. There is no "time-smear" or "time-delay distortion". END QUOTE
That is a description of a Walsh driver; the angle of the cone is just different from the F's angle because the material used to make the cone is different. The speed in witch sound travels in materials is dependent on what kind of material is being used and the cone angle has to be adjusted accordingly. This is why the angle of the cone in the newer Walsh drivers is different from the F's cones.
Just because the newer Walsh drivers are not mounted on a sealed cabinet does not change the fact that the driver itself is operating as described above.
What Eldartford said:...That there is a mechanical crossover at the point where the two dissimilar materials meat, is indeed a crossover.
This cone is fabricated of special materials which have a super-sonic velocity of sound propagation. By engineering the cone angle and propagation velocity properly, a coherent, cylindrical sound field is synthesized in the air around the cone; the listener, in fact, receives simultaneous sound.
As described previously, the apex of the cone is initially dent, and a sound-wave originating at the apex moves into the air at 1100 feet per second. Similarly, every point on the cone contributes its output at exactly the right time for ALL the wavelets to coherently merge into a cylinder, as shown in Figure 3. Wherever the listener sits, all the sound produced by one pulse reaches the ear at the same instant. There is no "time-smear" or "time-delay distortion". END QUOTE
That is a description of a Walsh driver; the angle of the cone is just different from the F's angle because the material used to make the cone is different. The speed in witch sound travels in materials is dependent on what kind of material is being used and the cone angle has to be adjusted accordingly. This is why the angle of the cone in the newer Walsh drivers is different from the F's cones.
Just because the newer Walsh drivers are not mounted on a sealed cabinet does not change the fact that the driver itself is operating as described above.
What Eldartford said:...That there is a mechanical crossover at the point where the two dissimilar materials meat, is indeed a crossover.