Overview
The Bach 42BO Trombone is one of the most recognized and widely played large bore tenor trombones in the world. Known for its broad, rich tonal core and dependable projection, the 42BO has remained a standard choice for orchestral players, advanced students, and working professionals for decades.
This particular example was lightly used and maintained in excellent condition, showing minimal signs of wear with no dents or structural issues. It represents the kind of well-preserved instrument that players actively seek when looking for a reliable Bach 42BO without the cost of buying new.
Design and Features
The 42BO features a traditional open wrap F-attachment design, allowing for a more open and free-blowing response compared to closed wrap configurations. This design supports smoother airflow and greater flexibility, especially in orchestral and legato playing situations.
Core specifications include:
- .547 large bore handslide
- 8.5" one-piece yellow brass bell
- Yellow brass tuning slide
- Standard weight slide construction
These elements combine to produce the classic Bach sound—centered, warm, and capable of both power and refinement across all registers.
Player Perspective
From a playing standpoint, the Bach 42BO offers a familiar and highly adaptable feel. The response is consistent, with a tonal palette that blends easily in ensemble settings while still allowing for strong solo presence when needed.
The open wrap configuration contributes to a more immediate and less resistant feel when engaging the valve, which many players prefer for modern orchestral and commercial versatility. Whether used in symphonic repertoire, chamber music, or advanced study, the 42BO continues to deliver dependable performance.
Condition Summary
This instrument was in excellent condition at the time of sale. It showed only light cosmetic wear consistent with careful use and had no dents or damage affecting performance. The slide, valve, and overall structure were fully functional and ready for professional use.
Included with the trombone were the original Bach case, a Bach mouthpiece, and basic lubricants, making it a complete, ready-to-play setup.
📸 Photography From Our Early Archive
Some of the images shown on this page reflect photography from the earlier years of The Brass Exchange. While our current listings feature highly refined, studio-grade presentation, these photos remain an important part of our history and documentation process.
They represent our early commitment to accurately capturing brass instruments for online buyers—well before “fine-art photography of brass instruments” became a standard in the industry. For collectors and researchers, these images still provide valuable reference for finish, engraving, and overall condition.
Questions Trombone Players Often Ask
Is the Bach 42BO a good professional trombone?
Yes. The 42BO is widely considered a professional-level instrument and is used by orchestral players, educators, and serious advancing students around the world.
What is the difference between the 42B and 42BO?
The primary difference is the wrap of the F-attachment. The 42BO features an open wrap design, which provides a more open feel and less resistance when using the valve.
🔧 Availability & Archive Status
This Bach 42BO trombone has been sold and is now part of our historical archive. It is preserved here as a reference for players, collectors, and those researching used trombone values.
If you are looking for a similar instrument, browse our current inventory here:
https://thebrass-exchange.com/trombones 🔎
You can also contact us for a valuation and explore your options ✍️
Closing Note
This Bach 42BO trombone has been sold and is now shown as a historical reference for players and collectors researching professional large bore tenor trombones.
