In 1999, Swan Group launched a beautiful and novel low-level linear and large dynamic low-distortion woofer suitable for digital audio sources, creating a new milestone for Swans speakers. 
 The diaphragm adopts the American advanced aluminum-magnesium alloy integrated metal structure diaphragm, the surface of the diaphragm is sprayed with a special damping layer, and the high-compliance support system has very good stiffness and dynamic stability, improving the acoustic characteristics of the speaker. High-power high-temperature resistant Kapton voice coil skeleton and high temperature resistant SV wire voice coil, shielded magnetic circuit system and long-stroke linear displacement design, Hivit's unique symmetrical magnetic field (SMD) drive technology makes the voice coil in a symmetrical driving magnetic field In order to obtain a symmetrical driving force, the mutual modulation of the voice coil inductance and the back electromotive force is significantly reduced, the control characteristics of the speaker are improved, the bass is full and powerful, and the distortion is low.
 Finite element precision computer simulation design integrated high-density aluminum pot frame - to eliminate parasitic structural resonance. The Small/Thiele parameter optimization design technology leading the world's counterparts facilitates the high-quality design of the cabinet.
 This unit is suitable for small inverted two-way bookshelf box with low intermediate frequency, home theater main speaker, center, surround and subwoofer speakers, and can also be used in computer multimedia speakers.