Trombonium

The trombonium is a valve trombone in upright form, formerly manufactured by E. H. White under its "King" label.^[2] It was unveiled by H.N. White in 1938 and manufactured until the mid 1970s.^[2] In the early 1970s, C. G. Conn also manufactured a similar instrument as their 90G model valve trombone.^[3]

Trombonium

King trombonium in B♭
Brass instrument
Classification	Aerophone Wind Labrosone Valved brass Cylindrical bore
Hornbostel–Sachs classification	423.233.2 (Lip-reed aerophone with valves and cylindrical bore longer than 2 meters[1])
Timbre	Trombone
Related instruments
Valve trombone Flugabone Baritone
Musicians
Darrell Leonard J. J. Johnson Kai Winding
Builders
C. G. Conn E. H. White

The trombonium has a timbre similar to a trombone. It is built with valves instead of a slide, in a compact upright form superficially resembling a baritone or euphonium, suitable for use in marching bands.^[2] A similar-sounding marching trombone is the flugabone, which is wrapped similar to a bass trumpet. The trombonium was used by the University of Southern California Marching Band^[2] and on a handful of jazz recordings (e.g., Jay and Kai + 6).