[1] Usually built in 12′ F a perfect fourth below the B♭ bass trumpet, it has the same length as the F contrabass trombone, cimbasso, or tuba.

A contrabass trumpet in 18′ B♭ played by tuba player Don Butterfield appeared in 1962 on the TV show I've Got a Secret.

In 1967, Roger Bobo, tuba player with the Los Angeles Philharmonic, commissioned a contrabass trumpet from instrument maker George Strucel.

[5] Tuba player Carl Kleinsteuber made four similarly configured contrabass trumpets in F in the 1990s.

[6] In the early 2000s, Latvian trombonist Vairis Nartišs built four instruments in 18′ B♭ which he called "subcontrabass trumpets", two of which are now in museums.