Command the Field with Rich, Resonant Tone
Tucked between the powerful brass and the percussive heartbeat of the field, the Jupiter JEP1105M Quantum MK II euphonium brings a rich, velvety tone that adds depth and warmth to any marching band’s sound. The combination of its 0.592-inch bore, nickel-silver leadpipe, and 11-inch yellow brass bell projects this rich, dark sound all the way to the press box. Meanwhile, the 1-piece bracing and valve section design optimize this instrument’s resonance and responsiveness. The JEP1105M benefits from a unique annealing process, enhancing its timbre for a pure, warm sound and a broad dynamic range. Additionally, you’ll appreciate the lightweight, balanced design of this instrument, which minimizes fatigue during full-day rehearsals and marathon drill blocks. Finally, you get a first-valve slide trigger and a third-valve slide finger ring for easy intonation adjustment, a right-hand carrying ring for ergonomic comfort, and smooth stainless steel pistons for fast action and agile playability. With unmatched tonal richness and a player-focused design, the JEP1105M Quantum MK II stands as a commanding presence in any ensemble.
Jupiter: guaranteed through graduation
A staple in classrooms everywhere, Jupiter band instruments are beloved by music teachers for good reason. Since 1980, the company has built high-quality band instruments for students of every development level. Innovations such as the Waveline flute headjoint and the patented Ergonomic trombone are just two examples of the company’s player-centered design philosophy. Each Jupiter instrument is inspected for quality throughout the manufacturing process, ensuring that it can endure bumps and bruises as easily as it can navigate technical passages. Sweetwater believes that every student should have access to the rich musical culture that unites us all. And with Jupiter’s player-first focus, anyone is welcome to embark upon an exciting and fulfilling musical journey through high school graduation and beyond.

Jupiter JEP1105M Quantum MK II Features:
- A durable marching euphonium with a rich, velvety tone
- 0.592-in. bore, nickel-silver leadpipe, and 11-in. yellow brass bell offer stunning projection
- 1-piece bracing and valve section design optimize resonance and responsiveness
- Unique annealing process delivers a pure, warm sound with a broad dynamic range
- Lightweight, balanced design minimizes fatigue during full-day rehearsals and marathon drill blocks
- 1st-valve slide trigger and a 3rd-valve slide finger ring supply easy intonation adjustment
- Right-hand carrying ring provides ergonomic comfort
- Smooth stainless steel pistons yield fast action and agile playability
- Includes an ABS case with an aluminum valance