Trivia
Two instruments, both tenor, but quite different!
There are two different models of trombones: jazz trombones and symphony trombones (for playing in an orchestra). Some of the parts on these two kinds of instruments vary. Especially noticeable is the size of the bell.
A jazz trombone has a smaller bell, thinner walls, and thinner tubing. The gap in the slide is also narrower. Jazz models are designed this way to make the instrument smaller and increase its mobility. This allows the player to slide quicker as he or she changes quickly from sound to sound.
On the other hand, symphony models are more focused on playing loud, and tend to be larger. A trombone needs to produce sound that is loud enough to reach members of the audience in the back row-all the way from the rear of an orchestra that may have more than 80 members. These thick instruments therefore have a large bell, and can be the first or second loudest instrument in the orchestra.
You could compare the jazz model with a pop or folk singer singing with a microphone, and the symphony model with an opera singer singing without a microphone.

Left: Jazz model; Right: Symphony model

Left: Jazz model; Right: Symphony model
Musical Instrument Guide:Trombone Contents
Structure
How to Play
How the Instrument is Made
Choosing an Instrument
Care and Maintenance
Trivia
- God is in the trombone
- The trombone was a bit of a problem for cavalries...
- A trombone that would scare even a snake!
- Two instruments, both tenor, but quite different!
- A trombone player walks into pawnshop...
- You can trill just by moving your mouth
- It is possible to increase the pitch even as you extend the slide
- Famous pieces from trombone concertos
- Orchestra pieces in which the trombone plays an important role
- The Yamaha quartet
- For trombones, why does sheet music notation differ from the fundamental tone of the instrument?
- A bass trombone-with an F attachment only