Tuba Junior Castillo LLC was born from passion, family, and innovation.

The company was founded by Wenceslado Castillo, a self-taught and highly talented tuba player with many years of professional experience. Music has always been more than a career for Wenceslado—it is a lifelong calling that he proudly shared with his family. When his young son Jonathan began showing a strong desire to play the tuba just like his father, a challenge quickly became clear.

Traditional tubas and sousaphones are heavy, oversized, and difficult for young children to handle. Determined to support his son’s passion, Wenceslado searched the market for a junior-size tuba but found that no suitable option existed.

Driven by his love for the instrument and his commitment as a father, Wenceslado set out to create a solution himself. Using his technical knowledge and musical expertise, he built a working prototype by carefully combining and modifying components from different brass instruments. The goal was clear: achieve the ideal size, balance, and sound quality that would allow a child to play comfortably—without compromising tone or performance.

The result was a junior-size sousaphone specifically designed for young musicians like Jonathan.

What began as a father’s solution for his son has now become a product available to families, schools, and young musicians everywhere. Today, Tubas Junior Castillo LLC proudly offers this junior sousaphone for sale through this website, helping children take their first confident steps into the world of low brass music.