This tweeter has new magnetic circuit composed of small ferrite magnet and magnetic material. The width of the diaphragm is not restricted by magnetic gap and the driving force is constructed so that all surfaces on the diaphragm vibrate in phase. This tweeter has an ultraflat and wide frequency characteristic which covers from 2kHz to a frequency higher than 50 kHz. The new flexible thermo-stable film for the diaphragm is produced by a specific process.
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