Bach 42BO Tenor Trombone Overview

The Bach 42BO Stradivarius tenor trombone is a long-established professional large-bore Bach model for players who want the breadth and presence of the Model 42 concept with the added flexibility of an open-wrap F attachment. Within the Bach Stradivarius trombone line, the 42BO is especially familiar to orchestral, wind ensemble, and serious low-brass players who value a centered sound, dependable projection, and a traditional Bach response in a Bb/F tenor trombone.

Bach 42BO Tenor Trombone Specifications

• Key: Bb/F
• Bore Size: .547 in large bore
• Bell Diameter: 8.5 in
• Bell Material: One-piece hand-hammered yellow brass
• F Attachment: Open-wrap F attachment with standard rotor
• Finish: Lacquer
• Case: Bach-branded hard case
• Accessories: Bach 6.5AL mouthpiece and trombone slide cream
• Serial Number: 83098

Condition & Setup

This Open Box trombone is in excellent playing order and has been professionally serviced, set up, and play-tested by The Mighty Quinn Brass and Winds. The lacquered brass surfaces have a glossy overall presentation with minor fine surface marks visible on the bell and polished areas. The Bach-branded hard case is included and shows light exterior scuffs and marks.

Who the 42BO Tenor Trombone Is For

The 42BO is intended for advancing collegiate players, professional trombonists, teachers, and serious ensemble musicians who need a large-bore tenor trombone with the flexibility of an F attachment. Its tonal identity is well suited to orchestral section playing, concert band, brass ensemble, pit orchestra, and other settings where a broad, centered tenor trombone sound and secure valve-register response are important.

Common Questions About the Bach 42BO

How does the 42BO differ from the Bach 42B?

The 42BO uses an open-wrap F attachment, while the 42B uses a traditional-wrap F attachment. Many players choose the open-wrap design for a freer feel through the valve register while retaining the familiar Bach Stradivarius large-bore character.

What kind of player usually chooses a .547 large-bore tenor trombone?

A .547 large-bore tenor trombone is a standard professional choice for orchestral, wind ensemble, and serious concert work. It gives the player room for a broad tone, strong projection, and a full low register while still functioning as a tenor trombone rather than a bass trombone.

Is the Bach 42BO suited to professional ensemble work?

Yes. The Bach 42BO is a professional Stradivarius tenor trombone and is widely used in orchestral, wind ensemble, brass ensemble, and teaching settings. Players focused primarily on commercial lead work or small-bore jazz playing may prefer a different trombone design.

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