HMX Retro J Tactile Switches

The HMX Retro J is a tactile mechanical switch designed for users who want a distinct, sustained tactile feedback throughout the keypress. It suits typists and enthusiasts who appreciate a clear tactile bump with a precise, high-pitched bottom-out sound. This switch offers a unique feel compared to similar tactile options like the Gateron Type R or BSUN Oceans, making it a good choice for those seeking a different tactile experience without sacrificing clarity.

Feel & Sound

• The tactile bump is described as round and consistent, lasting through the entire keypress, which helps with typing accuracy and feedback.
• The bottom-out produces a high-pitched, sharp click, characteristic of HMX switches, providing clear auditory feedback but may be less suitable for quiet environments.
• Its unique stem design differentiates the tactile feel from other HMX switches and similar tactile switches on the market.

Actuation Characteristics

• Actuation force is moderate, requiring 36±2g, which balances responsiveness with deliberate keypresses.
• Pre-travel of 2.5mm and total travel around 3.0mm means the switch activates early enough for fast typing but still allows full key travel for comfort.
• Bottom-out force is higher at 55±2g, contributing to the distinct bottom-out sound and feel.

Build Quality

• Top housing is made of polycarbonate (PC), and the bottom housing uses PA66, both durable plastics that influence sound and feel.
• The stem is made from POM, a material known for smoothness and durability, supporting consistent tactility.
• The switch comes factory lubed, which reduces initial scratchiness and improves smoothness without requiring immediate modifications.

Compatibility & Modifications

• It uses a 5-pin PCB mount, suitable for most custom keyboards with compatible sockets, but plate mount compatibility is unknown.
• Factory lubing is described as advanced, which may reduce the need for additional lubing, though users can still modify it if desired.
• The unique stem design means keycap compatibility is standard but may limit cross-compatibility with stems from other HMX switches.

Trade-offs

• The high-pitched bottom-out sound may not be ideal in noise-sensitive environments like offices.
• The distinct tactile profile may require an adjustment period for users accustomed to smoother or lighter tactile switches.
• Unknown information on hot-swap friendliness and long-term durability.