Bach 42BO Tenor Trombone Overview

The Bach 42BO Stradivarius is a well-established professional large-bore tenor trombone designed for orchestral, concert band, solo, and large-ensemble playing. The Model 42 platform has long been a standard choice among advanced and professional trombonists, while the 42BO configuration pairs that familiar Bach sound concept with an open-wrap F attachment.

Bach 42BO Tenor Trombone Specifications

• Key: Bb/F
• Bore Size: .547 in
• Bell Diameter: 8.5 in
• Bell Material: Yellow brass
• F Attachment: Open wrap with single rotary valve
• Finish: Lacquer
• Case: Bach fitted hard case
• Accessories: Bach 6 1/2 AL large-shank mouthpiece, cleaning rod, slide cream
• Serial Number: 226318

Condition & Setup

This trombone is in excellent playing order and very good overall cosmetic condition. It has been professionally serviced, set up, and play-tested. The lacquer remains glossy across most of the instrument, with light scratches and scuffs around the receiver and a localized area of lacquer loss, discoloration, and surface oxidation along part of the bell rim. The handslide bumper and included hard case also show light wear consistent with normal use.

Who the 42BO Tenor Trombone Is For

The 42BO is suited to professional players, advanced students, teachers, and serious ensemble musicians seeking a centered, projecting large-bore tenor trombone with the additional range and alternate-position options of an F attachment. Its broad tonal concept is particularly at home in orchestral and symphonic band settings, while the open-wrap configuration will appeal to players who prefer a direct path through the attachment tubing.

Common Questions About the Bach 42BO

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

Both models share the established Model 42 large-bore design. The 42BO uses an open-wrap F attachment, while the 42B uses a traditional-wrap attachment.

What does the F attachment add to this trombone?

The F attachment extends the instrument's practical lower register and provides alternate slide positions that can improve technical efficiency in orchestral, solo, and ensemble literature.

What type of player typically chooses the Bach 42BO?

The 42BO is commonly considered by orchestral players, advanced students, educators, and performers who want the established Bach large-bore sound concept with an open-wrap rotary attachment.

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