The Kanstul 1550 Small-Bore Trombone represents one of the most distinctive jazz and commercial horns made by the late Zig Kanstul’s California shop.
This archived example was mint, essentially like new old stock, and had been barely played by its original owner.
Key features included a one-piece 8-inch copper bell paired with a lightweight brass .500 bore handslide, producing a tone that blended warmth, sweetness, and vivid color.
Players often compare this model to the classic Conn 10H Coprion Bell for its responsive copper bell character — offering a rich, flexible sound that can be played dark and mellow for ballads or bright and sizzling for high-energy jazz, rock, or funk work.
The bell construction brought out remarkable overtones and presence, while the slide provided the nimble, fast response prized by small-bore players in combo, section, and studio settings.
It performed equally well on mic or acoustically, making it a versatile choice for professional use.
Though Kanstul Musical Instruments closed its doors before the pandemic, the reputation of these horns endures.
Many professionals still regard Kanstul small-bore models as among the finest American-made jazz and commercial trombones of their era.
This particular instrument came with a new MTS protective case and needed no service or adjustment — a true time-capsule example of Kanstul’s craftsmanship.
Now sold, it remains here as part of our Archive of Sold Instruments, provided as a reference for players and collectors researching the legacy of Kanstul copper-bell jazz trombones.
FAQ
What makes a copper bell special compared to brass or gold brass?
Copper bells have a unique tonal character — offering warmth and depth with a softer initial attack.
Players often find they can shape the color more easily, giving both lyrical sweetness and bright “sizzle” when pushed.
How does the Kanstul 1550 compare to the Conn 10H Coprion?
Both share the copper-bell concept, but the Kanstul benefits from modern build precision and consistency.
Many players describe it as having a slightly more focused core while retaining that classic colorful resonance.
Is the Kanstul 1550 still sought after?
Yes. Since the closure of Kanstul in 2019, models like the 1550 have become increasingly rare — especially in mint, barely played condition — making them desirable for both performers and collectors.
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