Bach 42BO Tenor Trombone Overview

The Bach 42BO Stradivarius Professional Tenor Trombone is a large-bore F-attachment tenor trombone designed for professional symphonic and solo performance. It features an 8.5-inch one-piece hand-hammered yellow brass bell, a .547-inch large bore, and a traditional wrap F attachment with standard rotary valve for a centered response, strong projection, and the characteristic Bach symphonic sound. The clear lacquer finish adds subtle warmth to the instrument’s overall tonal profile, while the chrome-plated nickel silver inner handslide tubes support smooth, quick slide action.

Bach 42BO Tenor Trombone Specifications

• Key: Bb/F
• Bore Size: .547 inch
• Bell Size: 8.5 inches
• Bell Material: One-piece hand-hammered yellow brass
• Valve: Standard rotary valve
• Wrap: Traditional F-attachment wrap
• Slide: Standard yellow brass slide with chrome-plated nickel silver inner handslide tubes
• Finish: Clear lacquer
• Case: Original Bach Case
• Accessories: None included (takes large shank mouthpiece)
• Serial number: 212997

Condition & Setup

This is a used instrument. It is in perfect playing condition and shows evidence of prior use. There are some cosmetic lacquer issues around the bell rim that do not affect play. The trombone has just been professionally serviced in our shop, set up, and play-tested to ensure proper mechanical function and dependable performance.

Who the 42BO Tenor Trombone Is For

The Bach 42BO Tenor Trombone is a professional large-bore Bb/F tenor trombone built for players who need orchestral breadth, clear projection, and a traditional symphonic response. It is especially well suited to advancing conservatory students, working professionals, and serious adult players seeking a classic American orchestral trombone with an open feel through the bell section and dependable resistance through the F-attachment register.

Its one-piece yellow brass bell helps produce the broad, defined sound long associated with the Bach 42 series, while the .547 bore supports a full orchestral core without sacrificing clarity. The traditional wrap F attachment and rotary valve give the instrument a familiar blow and response that many players prefer for section work, solo literature, and general professional use.

Common Questions About The Bach 42BO

What is the Bach 42BO?

The Bach 42BO is a professional large-bore Bb/F tenor trombone with an 8.5-inch yellow brass bell, .547 bore, and traditional wrap F attachment. It is widely associated with symphonic playing but is also suitable for solo performance.

Is the Bach 42BO suitable for professional use?

Yes. The Bach 42BO is a professional-model Stradivarius tenor trombone designed for advanced and professional players. Its specifications and playing characteristics are appropriate for orchestral performance, conservatory study, and other demanding musical settings.

How does the Bach 42BO play?

The Bach 42BO offers a broad, centered sound with strong projection and moderate resistance. Players can expect smooth slide action, a clear response, and a tonal character that works well in symphonic ensemble playing as well as solo repertoire.

We are proud to be an authorized Bach dealer