The design of the clarinet was more advantageous by the tip of the eighteenth century. The two keys gave way to 5 or 6, giving the tool more pitch manage. Composers and virtuoso performers started to exploit some of the signal qualities of the clarinet, its versatile dynamic range, from whisper soft to loud and penetrating. Mozart composed a concerto for clarinet in 1791, appearing that he found out its possibilities as a solo device. By 1800, most orchestras blanketed clarinets. The clarinet constructed additional in the nineteenth century. Its intonation was stronger by a rearrangement of the holes, more keys were added, and the instrument's range was prolonged. Virtuoso performers toured Europe and encouraged composers corresponding to Spohr and Weber to write down clarinet concertos and chamber works. Instruments continued to be made from boxwood, though makers experimented with silver and brass to boot. Some clarinets were made out of cocuswood, a tropical wood found mostly in Jamaica. French makers began making clarinets out of ebony, a heavy, dark wood from Africa, in the mid 19th century.