Name: Fluba, a hybrid of tuba and flugelhorn.
A type of brass instrument
Invented by: Jim Self
Designed by: Robb Stewart
External links:

• https://www.bassethoundmusic.com/fluba.html
• https://www.robbstewart.com/fluba/

Disambiguation: a hybrid of tuba and flugelhorn
Description: The design is like a huge antique flugelhorn. It sounds like something between an F tuba and a cimbasso. The sound is directionally forward and is very mellow sounding. It is a little brighter than a tuba and a little darker than a contra-bass trumpet.

example uses:

• http://www.oddmusic.com/clips/fluba.mp3