Akko CS Jelly Black
vsGazzew Boba U4 62g Black Housing
Hear them
Side by side
| Akko CS Jelly Black | Gazzew Boba U4 62g Black Housing | |
| Type | Linear | Linear |
| Sound | Balanced | Silent |
| Loudness | -47.9 dB | -40.7 dB |
| Pitch | 1,591 Hz | 2,912 Hz |
| Spring weight | 74.9 g | 74.2 g |
| Actuation force | 49.7 g | 51 g |
| Bottom-out force | 89.9 g | 93.5 g |
| Total travel | 4.1 mm | 3.8 mm |
Force curves compared
Both curves modeled from each switch's measured actuation, bottom-out values.
Which should you pick?
The Akko CS Jelly Black and Gazzew Boba U4 62g Black Housing are both linear switches, but they feel and sound different enough to be worth comparing directly.
Akko CS Jelly Black runs the heavier spring at 74.9g versus 74.2g — about 0.7000000000000028g more — so it feels more deliberate under the finger, while Gazzew Boba U4 62g Black Housing is quicker and lighter to press.
On sound, Gazzew Boba U4 62g Black Housing is the louder of the two at -40.7dB versus -47.9dB (7.199999999999996dB quieter), pitched higher at roughly 2,912Hz. It reads as silent, while Akko CS Jelly Black comes across more balanced.
Pick Akko CS Jelly Black if you want a heavier, more controlled press and a quieter typing sound. Pick Gazzew Boba U4 62g Black Housing if you'd rather have a lighter, faster press and a louder, more present sound. Use the players above to hear which one you actually prefer.
Full pages
Hear the difference for real
Load either switch into the live simulator and A/B them with your plate, case and keycaps.
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