Celestion have introduced two large format, 1.4-inch and 2-inch exit neodymium magnet compression drivers. These products features a “next generation” design phase plug, developed at Celestion’s UK headquarters, using technology that results in far more accurate sound reproduction than is available from typical devices already on the market.
Check out the specifications here: Large format compression drivers
A brand-new and patent-applied-for method, developed by Head of Group Research Mark Dodd and his team, has been used to calculate key dimensions within the compression driver’s phase plug.
“It’s possibly the most significant development in annular phase plug design in 50 years” commented Dodd, who presented his findings at the 123rd AES (Acoustical Engineering Society) Conference, in October 2007.
“While looking further into modal decomposition as applied to a curved diaphragm, we were able to develop a new set of criteria that re-defined the calculation of specific phase plug dimensions. The result is greater modal suppression and reduced air non-linearity – in other words, less distortion.”
The compression driver also features a deep-drawn titanium diaphragm, for increased stiffness. This results in a higher threshold frequency that avoids the dome break-up (distortion)—within the critical mid-range listening band of 2-10kHz—that is associated with the lower profile diaphragms of typical large format devices.