The C2J has been used by orchestra players on their C
execute the extreme soft passages in the repertoire and
passages that require a dark sound (Mahler Symphonies #3
and 9, and Brahms, for example). It is also optimal for church settings
where a warm chorale type sound is desired.
Jazz players use the C2J to get a flugel sound when
soloing and when playing ballads. Some find it convenient
not having to switch to a cold horn, or even carry a flugel
to a gig just to play one ballad.