Sean,
The following is quoted from a Six Moons' review of Ohm's Walsh Micro speakers.
IF the description is true to the design, I find it hard to believe that the CLS driver is not a derivation of the original Walsh driver and is just an inverted speaker. True, the Ohm F's had a longer ~12" cone (not including the motor), but it also covered the complete audio range (37 - 17,000hz). The new CLS cone (I am talking about the Walsh 5 Mk II) is only ~5" - 6" tall (hard to tell from the drawings) and only covers the claimed 20 - 8,000hz range.
Think of it this way. If you took a full range driver, mounted it into a cabinet ABW (ass backwards), would it still be able to produce the mid to high frequencies as a correctly mounted driver?
I am not saying I am right. There just seems to be too many inconsistancies posted. Just trying to find the "truth" (if that is possible).
The following is quoted from a Six Moons' review of Ohm's Walsh Micro speakers.
Ohm Acoustics manufactures two very different types of loudspeakers - the usual cone'n'dome variety (certain models incorporating different ideas on dispersion) and their claim to fame, a complete line of speakers using the Walsh driver based on the work of the late Lincoln Walsh. Years of refinement have created what Ohm calls the CLS or Coherent Line Source driver. Picture a typical cone woofer elongated in depth akin to a megaphone - but not quite. Now point this driver downward so that it fires into the top of the speaker's enclosure. Sound propagates off the back of the driver rather than front, and by virtue of its open-air surroundings, in a 360-degree rather than narrow-directivity dispersion pattern.
States Ohm Acoustics on the subject: "The CLS system uses an inverted cone driver with the speaker coil driving the peak of the cone. The sound vibrations travel from the top down and out to the rim.
By using a cone material in which sound travels faster than it does in air (supersonic) and by carefully aligning the angle of the cone, the driver generates a vertical wave front, radiating sound equally in all directions like an expanding drum. Because the inverted cone driver radiates in all directions, it sounds the same in all directions." In other words, the driver is naturally time-coherent and omni-directional. But Ohm feels that, with certain circumstantial exceptions, an omni-directional response in the treble is undesirable. Rear-wall reflections at these frequencies can become confused with the original sound and consequently blur imaging. Hence, in addition to the CLS main driver, Ohm adds a "super tweeter" mounted vertically at the Walsh driver's top and angled inwards so as to cross its main axis well in front of the listener. This tweeter is reportedly pressed into service around 8 kHz which eliminates a crossover network anywhere near the critical 2-6kHz range where human hearing is most sensitive to discontinuities.
IF the description is true to the design, I find it hard to believe that the CLS driver is not a derivation of the original Walsh driver and is just an inverted speaker. True, the Ohm F's had a longer ~12" cone (not including the motor), but it also covered the complete audio range (37 - 17,000hz). The new CLS cone (I am talking about the Walsh 5 Mk II) is only ~5" - 6" tall (hard to tell from the drawings) and only covers the claimed 20 - 8,000hz range.
Think of it this way. If you took a full range driver, mounted it into a cabinet ABW (ass backwards), would it still be able to produce the mid to high frequencies as a correctly mounted driver?
I am not saying I am right. There just seems to be too many inconsistancies posted. Just trying to find the "truth" (if that is possible).