The Walsh Ohm speaker sounds awful. It's a novel design, but next to anything else it's terrible. Explain to me how a single voice coil driver made from three different materials firing downward can have a wideband, high fidelity frequency response. Short answer...it can't...and doesn't.
Sony has had flat diaphragms. Morel makes a dome drivers. Mount a woofer backwards, magnet out and the box gains some volume. Drivers designed with a round cone have the advantage of basic rigidity. Different frequency based cone geometries are chosen for dispersion characteristics.... everything is a compromise.
Many new drivers have an inverted dome style for the diaphragm. Different materials and diaphragm treatments are also part of the mix.
The best motor design I've ever heard was the extreme underhung topology that was the NeoRadial developed by Aurasound back in the 1990s. Total voice coil immersion in the gap, very linear response, extremely low motor distortion...and very expensive to manufacture due to the amount of steel to house the motor. Over hung coils just cant do what underhung can do for low distortion control of the moving mass. The latest JBL Dual Differential motors is probably the closest with a braking effect from the coils as they reverse direction.
Sony has had flat diaphragms. Morel makes a dome drivers. Mount a woofer backwards, magnet out and the box gains some volume. Drivers designed with a round cone have the advantage of basic rigidity. Different frequency based cone geometries are chosen for dispersion characteristics.... everything is a compromise.
Many new drivers have an inverted dome style for the diaphragm. Different materials and diaphragm treatments are also part of the mix.
The best motor design I've ever heard was the extreme underhung topology that was the NeoRadial developed by Aurasound back in the 1990s. Total voice coil immersion in the gap, very linear response, extremely low motor distortion...and very expensive to manufacture due to the amount of steel to house the motor. Over hung coils just cant do what underhung can do for low distortion control of the moving mass. The latest JBL Dual Differential motors is probably the closest with a braking effect from the coils as they reverse direction.