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CG Conn Step-Up Model 20KSPW Brass Sousaphone

About the Model 20KSPW

The "original" sousaphone. This large bore sousaphone has the most sought after sound for the marching field. Ergonomically friendly as well as improved bracing over time for the demands of todays marching activity. Silver plated. With plastic case.

The "original" sousaphone. An historic design, the Conn 20K originated from the concepts of John Philip Sousa in the early 1900's. This large bore sousaphone has the most sought after sound for the marching field. Improved bracing to meet the demands of today's marching activity along with short action, offset pistons provides great versatility for any sousaphone section. Nickel plated pistons provide smooth, quick action and unmatched durability. Heavy duty wheeled case. Available without case as model 20KSP.

Conn - Key of BBb, .734" bore, 3 offset short action pistons, 26" bell, all brass construction, bright silver-plate finish, Conn 18 mouthpiece, 7761C molded plasic shell case with wheels.

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Charles Gerard. Conn was the patriarch of musical instrument manufacturing in Elkhart, Indiana.  In 1873, following a bar fight brawl that resulted in a split lip, C.G. Conn developed a brass mouthpiece with a rubber rim.  Conn, converted an old sewing machine to a lathe and set-up a shop building these mouthpieces.  In 1875, a French instrument maker named Dupont began repairing instruments in Conn’s shop.  After watching him work for a few days, Conn believed he could build his own instrument.  In that same year, Colonel Conn would build the first American made cornet.

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By 1879, Conn moved operations into larger quarters and began making other instruments.  In 1880, the town of Elkhart, Indiana became so enamored with C.G. Conn that they elected him Mayor.  During his second term, he was forced to resign due to a factory fire in 1883.  The factory was rebuilt bigger and better and production continued.  By 1893 his instruments were accorded the highest honors in the World’s Columbia Exposition in Chicago. 

The Colonel loved strange and bizarre instruments.  In 1907, he built an immensaphone, the largest horn in the world at 12 feet in diameter and 35 feet long.  Conn also continued on a series of “firsts”, building the first American made saxophone and the first sousaphone, built to John Philip Sousa’s specifications. 

In 1915 Conn retired and the company was purchased by Carl Grenleaf.  The business was renamed C.G. Conn Ltd.  During this era, Carl Greenleaf began the National School Band Movement.  In 1923, Greenleaf established the first National Band Contest in Chicago, and the Conn National School of Music in Chicago.  In 1928, he supported the National Music Camp at Interlochen, Michigan. 

The company flourished until the Second World War.  In 1942, the factory retooled to manufacture compasses, altimeters, and other items related to the war effort.  During this time, many of Conn’s dealers turned to smaller instrument makers who were allowed to manufacture instruments on a limited basis.  Coming out of wartime production, Conn found difficulty regaining its position as the number one band instrument maker. 

In 1969, the Greenleaf family sold the business to Crowell-Collier MacMillan, a publishing company.  Manufacturing of Conn instruments was split between Nogales, Arizona and Abilene, Texas and the Elkhart factory was sold to the Selmer Company.

In the 80’s through a series of mergers, C.G. Conn Ltd was combined with Slingerland Drum Company, Artley, Scherl & Roth, and several other musical instrument manufacturers and distributors to eventually form United Musical Instruments (UMI).

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