If you've paid any attention to gaming accessories the past few years you've likely heard something about the benefits of Hall Effect joysticks and triggers. Essentially, instead of using a physical connection to sense movement, Hall Effect sensors use magnets. The idea is to reduce wear and tear on components to give you more durability as well as improve the controller's response time. Most gamers probably won't notice the difference between a standard and Hall Effect controller, but for the hardcore gamers, where every millisecond counts, it can make a big difference.
Hall Effect controllers have exploded in popularity over the past few years, so I suppose it was only a matter of time before companies started using this same technology in keyboards. Behold the Keychron K4 HE: It's a 96%-sized wireless keyboard from the world-renowned company. As you probably guessed from the intro, it uses uses Hall Effect switches instead of traditional mechanical switches. The result is a combination of superlatives like impressive, enjoyable, annoying and ridiculous overkill, all in one package.
What I like about the Keychron K4 HE
For starters, the build quality is exceptional, as I've come to expect from Keychron. The K4 HE has a good bit of weight to it, which gives it a premium feel, and the wood sides of the Special Edition version I reviewed add a touch of luxury as well. It's available with either black or white keycaps with slightly different wood tones for each. There's also a Standard version, which has Cherry-profile keycaps instead of OSA-profile and loses the wood side rails, knocking about $10 off the price.
CNET/Jason Cockerham
The most important feature of the K4 HE, however, is the Hall Effect switches. The use of magnets enables a 0.2 to 3.8mm actuation range with a minimal 0.1 mm sensitivity. The Nebula Gateron switches that came with my K4 HE have a start and end actuation force of 40 gram-force and 60 gram-force, respectively, but you can get other Hall Effect switches with smaller or larger actuation forces. It's worth noting that the K4 HE is only compatible with double-rail magnetic switches. So while you can hot-swap the switches, you cannot use traditional mechanical switches.
What's really nuts is the insane levels of software customization available. You can set different actions for different actuation points within each keypress, meaning a shallow, 0.2mm keypress could trigger one action while a deeper, 3.8mm keypress could trigger a different action. There's also Last Key Prioritization, which prioritizes the last key pressed, and Snap Click, where deeper keypresses take precedence when you press two keys at the same time. Basically, this allows you to trigger multiple actions in a game without having to lift your fingers for multiple keypresses. In games that require speed and fast reaction times, this can be huge.
CNET/Jason Cockerham
The Rapid Trigger feature also gets a speed boost because each keypress is reset the moment the key travel reverses, meaning you can keep firing or moving literally as fast as your finger can move. Honestly, the most surprising thing to me is that you can have up to four distinct actions per key based on how hard you press it. As in, you can program up to four stages per key, which triggers a keypress at each stage.
This is my first experience with Hall Effect magnetic keyboard switches and the typing experience is… interesting. Fully aware of the irony, I immediately noticed how firm and tactile the typing experience felt when I first started using it. The design engineers at Keychron deserve a lot of credit for tuning the magnetic resistance so superbly. It feels amazing to type on.
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