HMX Crystal Magnetic HE
The HMX Crystal is a magnetic Hall-effect linear with adjustable actuation and a smooth, bounce-free keypress. A look at its feel, compatibility and use.
How it feels
How it sounds
Full review
Quick Summary
The HMX Crystal is a magnetic Hall-effect linear, not a traditional contact switch. It reads keypresses through magnets and sensors instead of metal leaves, which means an adjustable actuation point and a keypress that is genuinely free of bounce or chatter. If you are building an HE board for gaming and want a smooth, no-frills linear feel, the Crystal fits the brief. Note that it only works on compatible magnetic PCBs.
Specs and Feel
Crystal runs a 3.3mm total travel with a POM stem in a polycarbonate top and a beefy PA66 nylon-plus-30%-fiberglass bottom housing. That housing combo is built for rigidity, and it shows: the keypress is clean and stable with very little wobble. Because there is no physical contact leaf, the travel is uninterrupted and very smooth top to bottom, with no tactile artifact and no leaf scratch. Instead of force-in-grams, the spec sheet talks in magnetic flux: roughly 140Gs at the initial point and 900Gs at bottom-out, which the sensor interprets as your actuation. The sound is secondary on a switch like this; the appeal is the feel and the software-controlled trigger.
Tuning
There is not much to tune here, and that is the point. Hall-effect switches live and die by their board’s firmware, so the real “tuning” happens in software: setting your actuation distance, rapid trigger, and per-key sensitivity. The switch itself is smooth enough stock that lube is optional, and many HE players leave them alone to keep behavior consistent across the board. Compatibility is the thing to verify: manufacturing differences mean Crystal may not play nicely with every HE or magnetic keyboard, so confirm against your board before committing.
Verdict
Buy the HMX Crystal if you already own (or are building) a magnetic/Hall-effect keyboard and want a smooth, stable linear at a friendly price. Skip it entirely if you run standard mechanical boards, since it simply will not work. Against other HE options it competes on that classic HMX smoothness; if your board’s compatibility list points elsewhere, follow the list, but on a supported PCB the Crystal is a solid, affordable choice.
Frequently asked
Will the HMX Crystal work in a normal mechanical keyboard?
No. It is a magnetic Hall-effect switch that needs a compatible HE/magnetic PCB. Drop it into a regular hotswap board and it will not register.
Why pick a magnetic switch over a normal linear?
The big draws are adjustable actuation by travel distance and rapid-trigger style resets, which is why HE switches are popular for competitive gaming.
Is the actuation point really adjustable?
Yes. Because the board reads magnetic flux rather than a physical contact, you set the trigger point by distance traveled in your keyboard's software.
Compare HMX Crystal Magnetic HE against another switch
Stack specs, sound profiles, and feel side by side.