Skip to content

Speaker post mount for threaded bosses

Printable speaker post mount that bolts into a keyboard's monitor bosses

Open the tool Download zip

Speaker post mount for threaded bosses with its default settings

Screenshot of the tool as it opens; it is a real capture, not a mockup.

Thanks, your report was sent.

Report a problem or a newer version
What is it?

No name or address needed, and please leave personal details out of the note. Only I read reports, and each is deleted after 90 days; the privacy page has the details.

What it makes

Binary STL files for a post-and-head speaker mount: part A, a base that bolts into a keyboard's two threaded monitor bosses with a blind socket for the tube (plus a mirrored copy for the other side), and part B, a round head with a conical skirt, a matching socket and a hex pocket for a captive speaker stud (M6, M8, M10 or 3/8-16). The default is the v8 design for Nord keyboards with monitor screw holes (Piano 4/5/6, Grand, Stage 3 Rev B, Stage 4), which was printed and fitted before this tool was made.

How to use it

  1. Start from the Nord v8 preset (my pick) or one of its variations.
  2. Measure your tube's outside diameter with calipers and enter it, then check the boss spacing against your keyboard.
  3. Pick the stud thread your speaker or its adapter takes, and adjust the face relief if something on the panel sits between the bolts.
  4. Choose your printer bed and read the Geometry checks: each one tests the exact STL you will download. Select a check to see its probe points on the part.
  5. Download the base, the mirrored base and the head, and print them as exported with no supports; follow How to build for hardware and assembly.

Build notes

  • The design came from a physically verified print (v8) of a parts-as-code project where a Python script is the source of truth and a verify script interrogates the exported STL. This tool rebuilds the same geometry in the browser and matches its bounding boxes exactly and its volumes to within 0.02 %.
  • The geometry checks run on the downloaded file itself: points are tested by ray parity, sections are cut to measure the bore and hex pocket, and every edge is matched for watertightness. A failing check is shown in red with its reason but never blocks a download.
  • Measure the depth of your keyboard's bosses before choosing bolt lengths, and confirm the base's handedness against the keyboard before printing both sides.
  • PETG is preferred for a part under constant load; PLA can creep and softens in heat.
  • Geometry booleans use the JSCAD modeling library (MIT), embedded in the file; everything runs offline.