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Bassoon Low A Extension (improved bottom-octave timbre), a 3D-printed bassoon extension
Image: Richard Moore via Printables, CC BY-NC-SA
Double reed · Bassoon extension

Bassoon Low A Extension (improved bottom-octave timbre)

A bell extension that takes a bassoon down to low A, with a swell for better low notes

Designed by Richard Moore, published on Printables

CC BY-NC-SA No commercial use Build info 2/5

Licence verified on Printables, 20 October 2026.

Get the files on Printables ↗ Watch the video
Adds
Low A1, a semitone below the normal range
Bell
Swell improves low B, C and D
Print
Raft, walls at least 1.2 mm, 0% infill
Material
PLA (others likely fine)
Difficulty
Easy
On Printables
10 likes · 117 downloads · 0 makes · 0 comments (as of 20 Oct 2026)

About the Bassoon low A extension

A bassoon bell extension that reaches A1, a semitone below the bottom of the instrument's normal range, which some orchestral music calls for. The designer added a swell to the bell, because with a straight extension the low B, C and D sound muffled. Print with a raft, walls at least 1.2 mm thick and 0% infill. The designer used PLA and thinks other filaments are probably fine. His video demonstrates it.

What you'll need

Printed parts

  • Low A extension

Bought parts

  • Nothing

Build overview

Print settings

  • Adhesion: Raft
  • Walls: At least 1.2 mm
  • Infill: 0%
  • Material: PLA

Video

Play video: 3D-printed low A extension for bassoon (loads YouTube)
3D-printed low A extension for bassoon, Richard Moore (the designer). Plays from youtube-nocookie.com after you click.

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