The stunning midrange drivers, tonally precise tweeters and a superior crossover network come together to form an audiophile-quality component set perfect for demanding listeners. The component system is available in two system packs and include large 30mm tweeters considered among the industry's finest. QS Midrange woofers emphasize cutting edge three-layer Tri-Tech cones, consisting of woven carbon-poly facing, an ultra-rigid foam core and a second carbon-poly backing.