25mm High Fidelity dome tweeter with glass fibre reinforced plastic chassis. The diaphragm is vacuum formed from a precoated fabric. This unique SEAS technology gives a vast improvement in consistency compared with other coating methods. Careful matching of fabric and coating results in a very smooth frequency response throughout the audible frequency range and gives a very high degree of stability against changes in air temperature and humidity. The voice coil is immersed in magnetic fluid, allowing high power handling capacity and simplified crossover design. A damped hole in the pole piece and a tuned chamber behind the magnet result in a low resonance frequency.
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