MMD Princess Ultra Linear Switches

The MMD Princess Linear Ultra is a linear mechanical switch suited for users who prefer smooth keypresses without tactile bumps or clicks. It fits typists and gamers seeking consistent, quiet keystrokes with a moderate actuation force. The switch’s design emphasizes reduced wobble and improved lighting diffusion, making it a good option for those valuing stability and keyboard aesthetics.

Feel & Sound

• Provides a smooth, linear keystroke without tactile feedback or audible clicks.
• Enhanced "thock" sound due to nylon bottom housing, offering a deeper, less sharp bottom-out noise.
• Factory lubrication reduces scratchiness, contributing to a smoother initial feel.

Actuation Characteristics

• Moderate operating force of 42gf balances responsiveness and finger fatigue.
• Pre-travel of 2.0mm and total travel of 3.6mm suit users who prefer a noticeable but not overly long keypress.
• Bottom-out force slightly higher than actuation force, providing a firm but not harsh bottoming sensation.

Build Quality

• Top housing made of polycarbonate (PC) for durability and clarity.
• Nylon (PA66) bottom housing enhances sound profile and reduces stem wobble, which is the side-to-side movement of the stem affecting key stability.
• Stem made from LY material, designed for smooth travel.
• Single-stage spring with 21.5mm length supports consistent force throughout the keystroke.

Compatibility

• 5-pin design supports secure PCB mounting and compatibility with most standard mechanical keyboards.
• Integrated LED diffuser improves keycap backlighting uniformity.

Trade-offs

• Linear design may be less suitable for users who prefer tactile or clicky feedback.
• Despite factory lube, some users may want to re-lube for further smoothness or sound tuning.
• Unknown hot-swap friendliness and long-term durability.