✦ Instrument Overview
✨ This horn is sold and now part of our archive. Discover more available trombones in our shop today.
The Antoine Courtois AC502B “Mezzo” Series Bass Trombone is a French-built professional model designed for serious players seeking versatility across multiple ensemble types. Crafted in Paris, France, this instrument features a one-piece, hand-hammered 9.5" yellow brass bell, delivering a resonant, broad sound with remarkable projection and color.
Originally purchased by a third-year college player, this horn was recently traded back in and has received a complete professional shop service, including:
Full chemical bath and cleaning
Complete rotor service and valve port alignment
Fine adjustments for maximum playability and response
The valve section is exceptionally quiet and efficient, with balanced airflow throughout both valves. The handslide is free of defects, with 100% intact inner slide plating and a precise, pro-level alignment for smooth performance.
✦ Specifications
Model: Antoine Courtois AC502B “Mezzo” Series Bass Trombone
Origin: Paris, France
Bore: .562" standard weight
Bell: 9.5" one-piece hand-hammered yellow brass
Handslide: yellow brass outer tubes with yellow brass end crook
Valves: Independent F/Gb/D system — serviced and responsive
Condition: Excellent; no dents or repairs, minimal lacquer wear
Case: Original Courtois factory case included
Age: Approx. 10 years old
Mouthpiece not included
This professional used bass trombone plays at a level rivaling new examples costing over $6,300 USD in 2025, with limited availability from U.S. dealers.
✦ Player Insight
The AC502B “Mezzo” is a true all-around bass trombone for serious players — equally comfortable in band, orchestra, jazz ensemble, and trombone choir settings. It offers a focused, colorful tone that remains stable under pressure and blends beautifully in section work.
For advancing students, college players, and professionals seeking a versatile, European-built instrument with refined response and depth, this is an outstanding choice.
✅ Condition & Playability Summary
Fully serviced and adjusted for maximum efficiency
Valves operate quietly and precisely
Slide is smooth, fast, and aligned to factory spec
100% functional and ready for daily professional use
Excellent example of a high-quality used bass trombone
✨ This horn is sold and now part of our archive. Discover more available trombones in our shop today.
✅ FAQ
Q: Where is the Courtois AC502B made?
The AC502B “Mezzo” is handcrafted in France by Antoine Courtois, a Buffet Crampon company. Professional-level Courtois trombones like this model are assembled and finished in Paris, preserving the brand’s renowned craftsmanship and resonant sound.
Q: What is the difference between the AC502B and the AC420?
The AC502B is a true bass trombone with a .562" bore and independent valves, while the AC420 is a large-bore tenor model (.547"). The AC502B offers deeper range and fuller tone for low-brass section work.
Q: Is this a good option for a college bass trombone player?
Yes. Its versatility makes it ideal for daily use across concert band, jazz ensemble, and orchestra repertoire — a reliable choice for advancing students or working players needing a flexible instrument.
This Antoine Courtois AC502B “Mezzo” Series Bass Trombone is available now — a rare opportunity to own a French-built professional instrument in outstanding condition at a significant savings from new pricing.
