The Dynavox LY401F 4" full-range driver is an extraordinary value which combines smooth extended response, low distortion, and high efficiency for a driver of its size. This driver will definitely deliver high performance in your next compact or portable speaker design.
The compact whizzer cone with phase plug design increases high frequency response while improving off axis dispersion. Another advantage of the aluminum phase plug attached directly to the pole piece is that it acts as an aluminum shorting ring, sort of an electromagnetic break, increasing cone control and lowering inductance. Finally, holding this driver together is a non-ferrous cast aluminum frame, which helps to concentrate all the magnetic force in the gap and on the voice coil where it is needed the most. All in all the LY401F is an extremely easy driver to work with.