HMX Iris Linear Switches

This linear switch is designed for users who want a smooth, relaxed keypress with a solid bottom-out and a focused sound profile. It suits typists or office workers looking for a quieter, controlled typing experience without tactile bumps. Gamers who prefer consistent linear feedback may also find it suitable, especially if they value a clean return and moderate actuation force.

Feel and Sound

The switch offers a smooth, unhurried linear feel thanks to factory lubrication, which reduces friction and scratchiness. Bottoming out feels substantial and solid, providing clear feedback without harshness. Its sound profile centers on mid-frequency tones that are full and controlled, avoiding sharp high-frequency noise. Sound can vary with keyboard damping: lighter damping makes it brighter and clearer, while heavier damping deepens and compacts the sound.

Actuation Characteristics

Two spring options provide choices between a lighter or slightly heavier actuation force, allowing users to select based on their typing preference. The pre-travel and total travel distances support a moderate keypress depth, balancing responsiveness with comfort. The switch has a tidy rebound, which helps maintain typing rhythm without feeling abrupt.

Build Quality

The stem is made from a UPE blend with PTFE powder, which contributes to smoothness and durability. The housing uses PA12 for the top and P3 for the bottom, materials that offer stability and consistent performance. Factory lubrication is applied to reduce initial scratchiness, minimizing the need for immediate modifications.

Trade-offs

While factory lube improves smoothness, the switch may still benefit from additional lubing for users seeking an even quieter or softer feel. The sound profile is focused on mid frequencies, so it may not satisfy those looking for very deep thocky sounds or extremely quiet operation. Unknown factors include compatibility details and long-term durability.