🔎 Historical Perspective
This King 6B Duo Gravis Bass Trombone, built in the late 1970s, represents one of the classic American bass trombone designs. The 6B has long been respected for its flexibility, projection, and balanced feel, and it remains a favorite among players looking for a professional-level bass trombone without the cost of a modern boutique instrument.
This example features the traditional dependent valve system, updated with split triggers that improve ergonomics and ease of use compared with the original configuration. It has a 9.5" yellow brass bell paired with a lightweight nickel silver handslide with yellow brass end crook — a combination that gives clarity, warmth, and excellent response.
The instrument had clearly been played and enjoyed over the years, with a few small dings and minor flare creases that were removed along the way. Structurally it remained solid, and it played exactly as a good Duo Gravis should. No additional service was needed to improve playability, and it included a new Protec Max case.
For players moving into bass trombone for the first time, or anyone wanting a dependable professional horn without entering the $3–6K range, instruments like this are a great solution. The 6B offers the classic American bass trombone sound with good balance and reliable response across the range.
The Brass Exchange has been serving brass players and collectors since 2010, helping musicians find the right instruments and preserving historically important models through our archive program.
📷 Older Photography Note – Archive Image Context
These photos on this listing come from an earlier period of our shop photography. They still accurately document the instrument and its condition, but may not reflect our current studio style. They are preserved as part of the historical record of this vintage King bass trombone.
✅ Common Questions
What is a King 6B Duo Gravis bass trombone?
It is King’s classic professional bass trombone model, known for its balanced feel, clear tone, and reliable dependent valve design.
Is a dependent valve bass trombone still useful today?
Yes. Many players prefer the lighter feel and simplicity, especially for big band or first bass trombone work.
Is the King 6B good as a first bass trombone?
Absolutely. It offers professional performance with manageable weight and cost, making it a strong first bass option.
🔧 Availability & Archive Status
This trombone has been sold and is now part of our Archive of Sold instruments. Archive listings remain online to help collectors and musicians research instrument history, specifications, and values.
📌 Archive Reference & Next Steps
Trying to determine the value of a vintage King trombone or looking where to sell a brass instrument safely? We help players and families every week with honest appraisals, trade-ins, and consignment options.
👉 Contact us here: https://www.thebrass-exchange.com/contact-us
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This King 6B Duo Gravis bass trombone has been sold and is now shown here as a historical reference for collectors and players. 📌
