The Conn 11DNSUL Connstellation Series horn combines a cutting-edge design with the best elements of Geyer- and Kruspe-wrap instruments. Developed over two years with input from renowned players and technicians, it features a mouthpipe with the openness of the 8D and the ease of play found on smaller horns. You'll appreciate the medium bell that balances the warmth and depth of the 8D with the color and projection of a more compact design. New F branches enhance the ergonomics and balance, while an adjustable finger hook creates an instrument that's comfortable to hold. Like other Conn horns, the 11DNSUL has a CNC-machined mouthpiece receiver for consistent mouthpiece fit and venturi between instruments. A corrosion-resistant nickel-silver mouthpipe with water key and durable nickel-silver inner/outer slide tubes ensure lasting performance. Optimized bracing, a .468" bore, rotary valves, mechanical linkage and Geyer wrap further elevate this professional double horn with its detachable 12.25" yellow brass bell.