The Bach 42BO has been one of the most trusted large-bore tenor trombones for decades.
Known for its open-wrap rotor design, smooth response, and balanced feel, it has been recommended by band directors and professional players alike as a reliable choice for advancing students and working musicians.
This particular 42BO was built between 2006 and 2010 and was adult-owned, lightly played, and kept in mint condition.
It features the classic 8.5-inch yellow-brass bell paired with a standard-weight .547-bore handslide for a large-shank mouthpiece.
The rotor section operates smoothly, the slide is straight and true, and the horn plays exactly as it should — free-blowing, even across registers, and with the characteristic warm Bach sound.
The instrument comes with its original brown wood-shell zipper case, also in excellent condition.
A mouthpiece is not included, which is common for professional-level second-hand horns.
Its overall care and condition make it an outstanding example of a pre-owned 42BO.
For players moving up from an intermediate instrument, the 42BO has long been regarded as a “first true professional” large-bore tenor.
It handles orchestral, wind-ensemble, and solo repertoire with ease, while its durability and consistent build quality make it a staple in many school and university programs.
This Bach 42BO has been sold and is now displayed here as part of our Historical Archive for reference by collectors, players, and educators.
🟩 FAQs
Q: Why is the 42BO such a common recommendation for advanced students?
A: Its large-bore design with open-wrap rotor produces a broad, stable tone and smooth low-register response, making it versatile for orchestral and symphonic band work.
Q: How does the open-wrap rotor differ from a closed-wrap design?
A: Open-wrap tubing gives the air column a straighter, freer path, often resulting in slightly more open feel and resonance in the lower register.
Q: Does this instrument require any servicing before use?
A: No — it was fully functional, with valve and slide in excellent condition at the time of sale.
Q: Can I find similar instruments available now?
A: Yes — browse our current trombone listings 🔎 or contact us 📣 to ask about incoming inventory.
📣 Interested in selling or trading your Bach 42-series trombone? Contact us here
