Makers soon applied the double slide to bass trombones in F and E♭ that would normally require a slide handle to reach the longest positions. Newly invented models of contrabass trombone in low 16′ C and 18′ B♭ soon followed, and the first double-slide contrabass trombones were produced by Parisian maker Jean Hilaire Asté (known as Halary) in the 1830s.
Makers promptly incorporated the double slide into bass trombones tuned to F and E♭, which would usually require a handle for reaching the longest positions. Concurrently, new models of contrabass trombones in low 16′ C and 18′ B♭ were introduced, and the first double-slide contrabass trombones were produced by Parisian maker Jean Hilaire Asté (known as Halary) in the 1830s.