Item #1176610 Model #20K

Conn 20K Series Brass BBb Sousaphone 20K Lacquer Instrument Only


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The workhorse of Conn sousaphones.

The 20K Series BBb Sousaphone from C.G. Conn is the iconic design based on the original Sousaphone design by John Philip Sousa. Constructed from 100% brass, this marching instrument produces a colossal sound that soars over the field. Its large .734" bore and 26" bell enable players to achieve a full range of dynamics. Offset short-action pistons provide an ergonomic feel and ultra-fast response. Most importantly, the 20K features standard heavy-duty bracing to handle the demands of today's marching activities.

Choice of Finish and Brass Body for Coveted Tone
The 20K Series offers a variety of finishes from clear lacquer, bright silver plate or satin silver finish to provide a subtle warmth and brilliance. Its large .734" bore and 26" bell work together to produce the highly coveted BBb Sousaphone sound—massive, far-reaching, and full while being comfortable to play.

Swift Pistons and Sturdy Build for Quick Response
The classic 20K design with offset short-action pistons offer smooth, rapid valve action to benefit any Sousaphone player. Nickel plating helps the pistons resist wear for consistent, quick movement. Standard heavy-duty bracing provides added physical and tonal stability so the 20K Series can play its best in any environment, delivering huge volume to anchor the band.

The Original Marching Horn, Reimagined
Considered the original Sousaphone taken on John Philip Sousa's original concept, the 20K Series pays homage to the traditional Sousaphone sound. Its 100% brass body, large bore, and bell work together to produce a booming low end, wide dynamic range, and sound that carries. The 20K gives players an iconic horn that meets the demands of today's marching bands from middle and high schools to college and universities.

Ready to Lead the Band
With its powerful sound, durable build, and ergonomic feel, the 20K Series BBb Sousaphone is ready to lead the band. Available in a choice of instrument only or with a protective wheeled case, this resonant horn delivers a traditional Sousaphone tone that soars over the field. Order the 20KSB BBb Sousaphone for your ensemble today.


  • Key: BBb
  • Weight: 28 pounds
  • Bore: .734-inch
  • Bell: 26-inch
  • Bell Material: Brass
  • Body Material: Brass
  • Number of Valves: 3
  • Valve Position: Front Action Piston
  • Valve Material: Nickel
  • Features: Exclusive Offset Short Action Pistons
  • Case: 7761C Wheeled Case ” Optional
  • Mouthpiece: Conn 2
  • Finish: Lacquer, Silver, Satin Silver