S.E. Shires Model Q38YR Q-Series Contrabass Trombone with Rotax Valves

S.E. Shires STBQ38YR Contrabass Trombone Overview

The S.E. Shires STBQ38YR is a Q-Series contrabass trombone built for players who need depth, clarity, and control in a responsive, balanced instrument. With European-style independent valve operation and precision Rotax rotary valves, it is designed to deliver an even, predictable response and smooth transitions across all registers, supporting both large-scale power and refined articulation for modern orchestral and solo repertoire.

S.E. Shires STBQ38YR Contrabass Trombone Specifications

• Instrument: Contrabass Trombone
• Key: F/D/Bb/Ab (European tuning; independent valves)
• Bore: .590 in
• Valves: Rotax rotary valves
• Bell: 10.5 in two-piece yellow brass detachable-flare bell with soldered bead
• Finish: Clear lacquer
• Series: Q-Series
• Case: S.E. Shires case
• Accessories: Mouthpiece and care kit

Condition & Setup

New. This instrument has been professionally serviced, set up, and play-tested to confirm proper slide function, valve alignment, and consistent response through the full valve combinations and range.

Who the STBQ38YR Contrabass Trombone Is For

The STBQ38YR is a European-tuned F/D/Bb/Ab contrabass trombone designed for advanced and professional trombonists who need contrabass power with controlled response and reliable valve technique. Its independent valve system favors using each valve on its own (rather than a dependent configuration), helping players avoid extended slide positions and move through technical passages with an efficient blend of valve and slide technique.

The .590 in bore and 10.5 in detachable-flare yellow brass bell are built to produce a rich, resonant tone with focused projection and a vibrant core. This configuration supports the agility required for modern repertoire and complex orchestral writing while maintaining the balance and mechanical consistency associated with S.E. Shires builds.

Common Questions About The S.E. Shires STBQ38YR

What does European tuning mean on the STBQ38YR?

European tuning on the STBQ38YR refers to an independent valve system in F/D/Bb/Ab where each valve is intended to be used independently, making common passages less dependent on extended slide positions and improving technical agility in modern orchestral and solo literature.

What is a Rotax Rotary Valve?

A Rotax valve is a specialized rotary valve design used on high-end brass instruments that helps bridge the gap between European and American tuning concepts. Its defining feature is a distinctive internal rotor geometry that begins relatively flat and transitions into an expanding shape, reducing air turbulence and allowing for smoother airflow back into the instrument. In practice, Rotax valves are prized for their light, fast action and the “solid core” they provide in the low register, a quality many players consider essential for contrabass performance. They also offer a notably centered and secure response, often feeling more stable than axial-flow valves while retaining quickness. As a result, Rotax valves combine the free-blowing efficiency of modern valve designs with the tactile feedback and clarity associated with traditional rotary systems.

What is the advantage of the detachable-flare bell?

The 10.5 in detachable-flare bell improves portability and supports flexibility in feel and response while retaining the core tonal characteristics of a two-piece yellow brass bell.

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