There were lots of speakers using that shape fifteen years ago, some of the Genesis models come to mind. The idea is not to have parallel surfaces on the upper range drivers. This prevents standing waves inside the cabinet. A few companies have used the same idea in their bass cabinets too.
Drivers are not what actaully makes the distinctive sound of a particular speaker. The sound is ALWAYS a combination of speaker cabinet material, crossover network, including the binding posts, internal cables, cabinet geometry, and the drivers. That's why the same drivers do not sound the same in different speakers.
For example, the same drivers in the same speaker cabinets will sound different by altering something as seemingly simple as a crossover slope. There are soo many variables to take into account...
Drivers are not what actaully makes the distinctive sound of a particular speaker. The sound is ALWAYS a combination of speaker cabinet material, crossover network, including the binding posts, internal cables, cabinet geometry, and the drivers. That's why the same drivers do not sound the same in different speakers.
For example, the same drivers in the same speaker cabinets will sound different by altering something as seemingly simple as a crossover slope. There are soo many variables to take into account...