Dome super tweeter employes a 25mm pure magnesium diaphragm. Low distortion and high power magnetic circuit with combination of the copper plating york/plate and the tripled 90mm large ferrite magnets. Up down roll tangential surround is to realize less anti-resonance and superior amplitude characteristic. Wide range and high input design. High-density resin frame with the shape designed to minimize the distance between the tweeter and a woofer for more accurate sound image.