125 W RMS Silk dome tweeter Hybrid fiber cone Integrated crossover Cast aluminum frame Premium spring-loaded speaker terminals SPL: 91 Db Frequency range: 45Hz - 20KHz Sundown’s premiere sound quality separates, the SA-6.5CS is a marvel of design and top-tier components. The midrange features a high-quality cast aluminum basket, housing a cone with a carefully selected blend of paper and wool fibers. This design dampens any unwanted resonances for an incredibly smooth, detailed response. The surround is a high-compliance rubber, engineered to tame edge resonances within the cone. An FEA-optimized motor was designed in-house and features a full 6mm one-way linear excursion - thanks to a carefully designed motor and extended pole piece. To increase thermal performance, the SA midrange features a vented magnetic gap and vented voice coil collar. The SA series silk dome tweeter matches the smooth sound of the midrange. After extensive testing, Sundown optimized the tweeter’s gap, dome material, lens, and chamber damping material. The results speak for themselves. The SA separates were engineered for one, simple goal: to let you completely immerse yourself in the music. At any volume. For as long as you want.