Nobody wants flat beer or flat tires.
But with loudspeakers we love flat. More important, enthusiasts have always loved flat-shaped speakers. Unfortunately, these exotic speakers have always been plagued with problems. We love the shape, but their imposing size, poor sensitivity, and propensity to suck large quantities of flat green paper out of our wallets have limited their overall appeal. Because of its shape and overall length, a cone speaker needs elastic suspensions at the outer edge and near the apex of the cone to keep everything lined up.