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Decision 13 of 13

Sound & dampening

Tuning the acoustics — from hollow to deep "thock".

A keyboard's sound can be tuned by adding foam and dampening inside the case. Bare cases can sound hollow or pingy; case foam, plate foam, and mods like the "tape mod" deepen and tidy the sound toward the prized "thock". For total quiet, combine dampening with silent switches and a gasket mount. This is an optional finishing touch.

None / stock

No dampening. The sound depends entirely on the case and plate — can be lively and clacky, or hollow on cheaper cases. Some enthusiasts deliberately leave a well-designed board bare.

Case foam

A layer of foam in the bottom of the case absorbs hollowness and reverb for a cleaner, slightly deeper sound. The easiest, most common mod.

Plate foam + tape mod

Foam between plate and PCB plus tape on the back of the PCB deepens the sound noticeably toward "thock". A popular combination.

Full silence

Dampening foam, silent switches and a gasket mount together produce a near-silent, deep board — ideal for shared spaces and calls.

The options, compared

Every choice you'll see for this decision in the builder.

None / stock
Untreated

Leave the acoustics to the case and plate. Fine on a well-designed board; can be hollow on budget cases.

Pros
  • No extra cost
  • Lively, clacky character
  • Simplest build
Trade-offs
  • Can sound hollow/pingy
  • Less refined
Case foam
Easy win

The simplest, most effective mod — a foam layer that cleans up reverb for a tidier, slightly deeper sound.

Pros
  • Cheap and easy
  • Removes hollowness
  • Cleaner sound
Trade-offs
  • Modest effect alone
Plate foam + tape mod
Deeper "thock"

Plate foam plus the tape mod push the sound toward the coveted deep "thock". A favourite enthusiast combo.

Pros
  • Noticeably deeper sound
  • Inexpensive mods
  • Popular, well-documented
Trade-offs
  • Fiddlier to assemble
  • Can over-dampen if overdone
Full silence
Whisper quiet

Everything combined for a whisper-quiet, deep board — ideal for offices, calls and late nights. Pairs best with silent switches and gasket mount.

Pros
  • Near-silent typing
  • Office / call friendly
  • Deep, muted sound
Trade-offs
  • Best with silent switches
  • Most effort
Further reading
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