What a gasket mount does to the sound

Updated October 25, 2026

A gasket-mount keyboard holds its plate on strips of soft material instead of screwing it to the case, so less of each key press reaches the case and the board sounds softer and deeper. It is not a guarantee: the case, the foam and the switches still decide most of the result.

What the gaskets do

Inside a mechanical keyboard, the switches clip into a plate, and the plate sits on the circuit board in a case. How the plate meets the case is called the mount. In a gasket mount, soft strips sit between them. Keychron, describing its Q1: “the gasket mount uses a poron gasket to isolate the plate and PCB from direct contact with the case, giving a softer and quieter sound and feel.” It adds that the design “changes the way a board feels and sounds while typing” and gives a softer bottom-out.

Epomaker’s Sound Lab puts it as a choice of where the energy goes: the mount “decides whether energy dissipates into resonance or stays a sharp impact.” Its definition of thock is “The deep, low-frequency resonant sound of a well-built gasket-mount keyboard”, and its four steps to a thockier board end with “Switch to gasket mount”.

Its limits

A gasket mount is one part of a build. RTINGS lists case material, plate material, switch type, dampening and lubrication as the factors behind a mechanical keyboard’s sound, and the gaskets change only how the plate meets the case. A hollow aluminium case can still ring on gaskets, which is why makers sell foam to go with them: Keychron’s acoustic kit for the same Q1 adds 3.5 mm of Poron between plate and PCB, a 0.5 mm PE layer and 2.5 mm of Poron in the bottom case, and says it “can further eliminate the hollowness”. See foam mods.

A stiff plate on gaskets also behaves differently from a soft one. Keychron notes that “selecting different keyboard plates will bring different typing feel since the flexibility and softness of a mechanical keyboard, to a great extent, are related to the keyboard plate materials.” See plate materials.

Hear a soft build against a stiff one

Butter imitates a lubed linear on gaskets and foam; Knuckle an unlubed tactile on a steel plate. In Teclo’s model of the plate and case, Butter’s highest resonance stops at 5,250 Hz and Knuckle’s at 8,500 Hz, and Butter’s high resonances die away faster:

Butter’s energy sits in the middle, two thirds of it between 1 and 3 kHz, where Knuckle spreads more into the highs. Boulder is the other route to depth: a heavy case that rings, rather than gaskets that soak the ring up. The packs imitate these builds; they are not recordings of a gasket-mount board, and Butter and Knuckle also differ in lube and switch type.

For the rest of the chain, see why mechanical keyboards sound different.