Willson Q90S Euphonium Overview

The Willson Q90S is a professional Q-Series euphonium designed for musicians who want the secure low register and extended facility of a fully compensating instrument. Its place within Willson's euphonium line makes it a serious choice for brass band, wind ensemble, solo, and conservatory performance, with a design centered on a one-piece seamless bell and a traditional 3+1 valve layout.

Willson Q90S Euphonium Specifications

• Key: Bb
• Bore Size: .590 inch (15 mm)
• Bell: 11.5-inch one-piece seamless yellow brass bell
• Valves: Three stainless steel top-action pistons with one side-action compensating piston
• Leadpipe and Receiver: Nickel leadpipe with large-shank receiver
• Finish: Silver plate
• Case: Willson padded backpack case
• Accessories: Shires 6D mouthpiece, Ultra-Pure valve oil, and polishing cloth
• Serial Number: Q10277

Condition & Setup

This used euphonium is in excellent playing order and has been professionally serviced, set up, and play tested. The silver-plated surfaces remain bright and reflective overall. Cosmetic wear includes a small shallow dent on the lower outer bow and light scratches and handling marks in the same area.

Who the Q90S Euphonium Is For

The Q90S is suited to professional players, conservatory musicians, advanced students, and dedicated ensemble performers seeking a fully compensating Bb euphonium with a large-shank mouthpiece receiver. Its configuration supports the demands of brass band, wind ensemble, chamber, and solo repertoire, particularly for musicians who value a traditional 3+1 layout and the tonal foundation associated with a one-piece yellow brass bell.

Common Questions About the Willson Q90S

What distinguishes the Q90S within the Willson euphonium line?

The Q90S combines a fully compensating 3+1 valve system with an 11.5-inch one-piece seamless yellow brass bell. It occupies a professional position in the Willson line and uses a large-shank receiver.

What does the compensating system provide?

The compensating system adds corrective tubing when the fourth valve is used with other valves. This improves intonation and facilitates chromatic playing in the euphonium's low register.

What mouthpiece format does the Q90S use?

This Q90S uses a large-shank receiver. A Shires 6D mouthpiece is included with this instrument.

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