Jupiter XO 1236L-T Tenor Trombone Overview

The XO 1236L-T is a professional large-bore tenor trombone built for players who want a broad symphonic concept with the flexibility of an F-attachment and interchangeable leadpipes. XO positions this model in its professional trombone line, with an open-wrap F-attachment and Thru-Flo valve design intended for efficient airflow and a responsive low register. This instrument is an open-box XO 1236L-T in lacquer with serial number CB06727, prepared for a player seeking a serious large-bore tenor for ensemble, orchestral, wind band, and advanced study use.

Jupiter XO 1236L-T Tenor Trombone Specifications

• Key: Bb/F
• Model: 1236L-T
• Finish: Lacquered brass body
• Bore Size: .547 inch large bore with .563 inch F-section
• Bell Diameter: 8.5 inches
• Valve: Open-wrap F-attachment with Thru-Flo valve
• Case: XO Designer Series case
• Accessories: Large-shank 6 1/2AL mouthpiece, valve oil, slide cream, polish cloth, extra weight, and two extra leadpipes
• Serial Number: CB06727

Condition & Setup

This demo model trombone is in excellent playing order and has been professionally inspected, set up, and play-tested by The Mighty Quinn Brass and Winds. The instrument is very clean overall, with a glossy lacquer finish and only minor handling marks visible on close inspection, including light surface scratches on silver-colored slide receiver hardware near the model and serial engraving. The included case and accessories make this a complete professional large-bore tenor trombone package for the player who wants a current-production instrument without typical pre-owned wear.

Who the 1236L-T Tenor Trombone Is For

The 1236L-T is suited to advancing students, serious ensemble players, and professional trombonists who need a large-bore Bb/F tenor with a broad, centered sound and flexible response. Its open-wrap F-attachment and interchangeable leadpipe system give the player useful options for balancing resistance, articulation, and tonal density, making it a practical choice for orchestral section work, concert band, brass ensemble, and studio-style doubling where a full large-bore tenor sound is required.

Common Questions About the XO 1236L-T

How does the Thru-Flo valve affect the playing experience?

The Thru-Flo valve is designed to support a more open feel through the F-attachment, helping the low register speak cleanly while preserving the response expected from a professional large-bore tenor trombone.

Why are interchangeable leadpipes useful on this model?

Interchangeable leadpipes let the player adjust the initial response and resistance of the instrument. This is especially useful for players refining their setup for different mouthpieces, ensemble settings, and tonal goals.

Is the 1236L-T intended as a professional large-bore tenor?

Yes. The 1236L-T sits in XO's professional trombone line and is designed around the large-bore Bb/F tenor concept commonly used in orchestral, wind ensemble, and advanced studio settings.

We are proud to be an authorized Jupiter XO dealer