Designed for the Utmost in Performance
Serious competition bands require the best possible tools. That means you must outfit your low brass section with horns that pack outrageous projection without sacrificing tonality. The King KMB612S Bb marching baritone features a handcrafted yellow brass body with a responsive 10-inch bell. It has a large-shank mouthpiece receiver and a 0.500-inch bore, for a slightly brighter tone and plenty of breath support. Players will appreciate the trio of smooth-playing nickel-plated piston valves and adjustable first- and third-slide finger ring. What’s more, the King KMB612S ships in a stackable case that saves valuable storage space on the way to a performance. Are you serious about your marching band’s low brass power? The King KMB612S Bb marching baritone deserves an audition.
Intense tone and plenty of projection
When Sweetwater’s brass experts heard the KMB612S marching baritone for the first time, ears perked up all around. At normal dynamics, it delivers a centered tone with superb intonation courtesy of the adjustable first- and third-slide finger ring. As the player adds more air, the 10-inch yellow brass bell supplies a fierce resonance with enormous projection all the way to the nosebleeds. And once you hear the KMB612S, its tonal tenacity is immediately apparent.
Built for the years to come
King’s brass instruments are built to exceed the expectations of such a lofty name. As such, the KMB612S marching baritone comes with ultra-durable components that withstand the rigors of marching season. It features three nickel-plated pistons. Aside from their smooth, effortless playing feel, King’s nickel-plated pistons are some of the most durable on the market. Sturdy solder joints and hand supports make the instrument even more roadworthy. The KMB612S is finished in lacquer or silver for brilliant, show-stopping visuals.
King: crafting world-class instruments for more than a century
With more than a century of world-class instrument building under its belt, King has been the brand of choice for scores of renowned artists, including Cannonball Adderley, Charlie Parker, Tommy Dorsey, Ziggy Elman, and Harry James. Crafted in Eastlake, Ohio, this fine instrument supplies you with a level of performance and playability that befits King’s storied 100-plus-year history. Sweetwater is excited to be a part of such a celebrated legacy.

King KMB612S Features:
- Powerful marching baritone fit for any field
- 0.500-in. bore delivers a brilliant, easy-blowing tone
- 10-in. yellow brass bell projects with authority
- Nickel-plated piston valves provide a silky-smooth playing experience
- Adjustable 1st- and 3rd-slide finger ring enables quick intonation adjustments
- Vibrant silver or lacquer finish looks great on the parade route
- Includes King KBAR large-shank mouthpiece
- Stackable case saves valuable storage space