The Decoupled Double Dome tweeter found in the 685 S2 offers a dual-layer design that combines a thin aluminium dome for lightness and a thicker aluminium ring for rigidity. The tweeter is also decoupled from the main cabinet, kept physically separate in its own cavity with a ring of gel cushioning it from vibrations. This improves imaging and dispersion for a more natural, spacious treble. The two-way 685 S2 also features a full-range 6.5-inch driver constructed from woven Kevlar and using Anti-Resonance Plug dustcaps. The result is stunning audio quality from a highly versatile smaller speaker.