Quick Summary

I’m very happy with the Epsilon Linear Switch with them taking their place as my favorite switch period. Typing on them feels exceptionally unique with unrivaled smoothness stock or modded with lube due to the innovative long progressive spring. The switch stock also has a nice clack sound as it is sturdy or without rattle. When lubed, the switch’s sound gets even better with the potential to really thock with a rich deep sound. You can listen to the sound test at the sound section. The bright orange color is also fun though it does clash with RGB making it light up a bit orange. Overall, I highly recommend this switch for anyone looking for a smooth typing experience, an excellent linear switch, or a deep thocky sound profile.

In the rest of the article more details will be provided about the switch’s feel with the unique progressive spring, sound, build, and potential issues.

Feel

This switch is buttery smooth and has a unique typing feel with its long progressive spring and lightly factory lubed P3 JWK stem. The progressiveness simply means the spring rate of the spring is saved for near the end of compression. Spring rate is a measure of the force required to compress the spring a distance. This means less force required for actuation and more force needed when getting closer to bottoming out or fully pressing down the switch. This increased required force at the end effectively counteracts the hard bottom outs that can be caused by long pole stems like the P3. The long length of the spring also overall decreases spring rate by spreading it out through space. The JWK P3 stem is smooth to type on and the lube further reduces friction. Overall, this creates an easy smooth typing experience with a bouncy cushioning effect when bottoming out.

Sound

The switch sounds clean with no noticeable undesirable noise when stock. Without modification, the switch is clacky or slightly higher pitched than average. Once lubed, the switch can become very thocky or deep sounding though this depends on the amount of lube applied. Filming helps with the thockiness though only slightly as there is practically no rattle to reduce to begin with. The switch also produces sound at a reasonable volume despite the JWK P3 long stem which is often loud. Listen for yourself below with the switch stock and modded with lube and film in my kb67 lite with polycarbonate plate. If you want another source and to compare the sound of the Epsilon to other switches, check out Shoobs’ video review also below.

Build

The Epsilon Switch is built with quality by JWK coming with 5 pins, a progressive spring, and P3 long pole stem. The housing and stem have little wiggle meaning no rattling and need to secure with film. The 5 pins which firmly fit into PCB and in case of compatibility issues, you can clip the 2 plastic pins off. JWK who manufactures the switch is reputable and consistently releases quality product. The P3 long stem is also popular for its smoothness and bottom out sound.

Potential Issues

• If you lube the switch the factory lube on the stem may mess, you up. This means you either have to risk it by adjusting your technique or remove the lube.
• In some rounds of the Epsilons people have complained about a bothersome clicking sound that won’t go away even with lube though I didn’t experience this in any of my 70 switches.
• The typing feel is different than typical linear which some people may dislike
• The orange color clashes with RGB lighting making everything light up a bit orange