ELI5: Explain Like I'm 5

Subcontrabass tuba

Okay kiddo, you know what a regular tuba looks like? Well, a subcontrabass tuba is like a super big and low tuba. It’s so big and low that it can make sounds that even the normal tuba can’t make.

Just like how you can whistle different notes by making your mouth bigger or smaller, the subcontrabass tuba uses a longer and wider tubing to make deeper and lower sounds. It’s like having a really big straw to drink a milkshake.

But because it’s so big, it’s really hard to play and hold up. So, usually, only a few people in the world know how to play it, and they use it in special kinds of music like symphonies and big bands.

When you hear the subcontrabass tuba play in a song, it makes the music sound extra deep and powerful, like a big dinosaur roar.