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The most important verified numbers for this product, shown before the deeper sections.
How this product sounds and feels to type on, described in plain terms.
Cthulhu is consistently described as loud, crisp and clacky with a bright-leaning attack and full bottom-out. Those labels are directional rather than measured results because the completed keyboard build can substantially change its acoustics.
All three versions use the same factory-lubed linear construction and 3.5mm travel, but resistance changes with spring weight. Choose 37g for the lightest press, 45g for a balanced middle setting, or 50g for the firmest bottom-out.
What to check before ordering, and how the build is put together.
Cthulhu uses a five-pin MX-style footprint and is intended for mechanical keyboard PCBs or hot-swap sockets that support five-pin switches. Boards designed only around a three-pin footprint should be checked before purchase because the two extra plastic locating pins require matching PCB clearance. Factory lubricated across the confirmed 37g, 45g and 50g SKUs; no additional hand lubrication is required for basic installation or initial testing. 5-pin mount — confirm PCB and plate support for your board.
Cthulhu uses a 5-pin MX-style footprint, so the PCB or hot-swap socket must provide clearance for the two additional plastic locating pins. Check 3-pin-only boards before ordering instead of assuming every hot-swap keyboard accepts a 5-pin switch. Use the 10-switch pack for testing or replacements, while the 70-switch pack can cover many compact builds; count the actual switch positions and allow a few spares.
If you need tactile feedback or a silent build, compare other families.
Pick a switch whose operating force matches your preference.
Match the product to how and where you actually type.
Switch count depends on your keyboard's layout. The typical ranges below are a starting point — the exact number depends on the specific model and any extra keys.
This product is available in packs of 10 / 70 switches — pick a pack that covers your layout with a small margin for testing or replacements.
Exact switch count depends on keyboard model / layout (and any novelties or extra keys). Always confirm against your board's official key count before ordering.
Focused sections explain the details buyers care about, supported by the product's specification data.
SU LAB × HMX Cthulhu is a factory-lubed linear with 2.0 mm pre-travel and 3.5 mm total travel.
Its intended direction is crisp and lively rather than silent or tactile; the keyboard build still affects the final sound.
Cthulhu uses an M1 modified POM stem, a 22mm extended spring, and factory lubrication across its listed weight options. Those construction details stay consistent while the 37g, 45g, and 50g choices change how much resistance the press presents.
That makes weight selection the practical decision: choose the resistance you want without changing the switch from its linear, 3.5mm-travel format.
Cthulhu uses a five-pin MX-style footprint. Confirm that the PCB and hot-swap socket accept the locating legs before selecting a build quantity.
Choose the weight after the fit check, then count the keyboard’s actual switch positions.
Choose Cthulhu when you want a crisp, lively linear and can select the resistance that suits your hands.
Choose a quieter linear for noise-sensitive use, or choose a tactile switch when a distinct bump is the priority.
The goal is to make the key trade-offs visible: weight, travel, stock preparation, sound direction, and the type of user each product serves best.
Exactly what ships with this product. The switch count and color update with the options you select.
Straight answers to the questions that most often decide a purchase.
Choose the option for your build, add it to your cart, or compare before ordering.
