HMX FJ400 vs. Durock Koala

Overview

When it comes to mechanical keyboard switches, enthusiasts often weigh their options between various styles to find the perfect feel and sound that suits their typing habits. The HMX FJ400 is a linear switch known for its balanced sound profile and smooth keystroke, making it an ideal choice for those who appreciate a quieter typing experience without any tactile feedback interruptions. On the other hand, the Durock Koala is a tactile switch that provides a noticeable bump at the actuation point, giving users satisfying feedback without being overwhelming. This pronounced tactility allows for a more engaging typing experience while maintaining a low-pitched resonance that doesn’t disrupt others around you. Each switch caters to different preferences: the FJ400 offers a seamless, uninterrupted flow while the Koala engages typists with its tactile response. However, let’s dive in a bit deeper beyond generalities so you can best decide on the best switch for you.

By the numbers

HMX FJ400 Linear

Durock Koala Tactile

$3.50

$3.29 per 10

$5.50

$4.21 per 10

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Housing materials

The HMX FJ400 and the Durock Koala utilize distinct materials for their top housings, which impart different auditory characteristics to each switch. The FJ400 features a POM (Polyoxymethylene) top housing, known for producing a deeper, more muted sound profile that is pleasing and unique. In contrast, the Koala employs a polycarbonate top housing, which attributes to a sharper, higher-pitched, and crisper sound due to its rigidity. This contrast in materials affects the overall audio experience when typing, as the POM housing leans towards a warmer tone, while the polycarbonate housing enhances clarity and resonance, making it particularly appealing for situations where RGB lighting is used, given its translucency that allows light to pass through.

While the top housings of the FJ400 and Koala differ significantly, both switches feature nylon as their bottom housing material. Nylon is a notable choice for mechanical switches, as it is known for its ability to absorb sound, resulting in a fuller and deeper audio profile. Consequently, both switches will generate a duller and rounder sound when bottomed out, creating a sense of similarity in tactile and auditory response. The shared use of nylon in the bottom housing naturally aligns the feeling of typing across both switches, although the experience will differ due to the distinct top housing materials affecting the sound when keys are released.

Overall, the differing top housing materials lead to two contrasting auditory experiences: one is deeper and more muted with the FJ400's POM, while the other is sharper and crisper with the Koala's polycarbonate. However, since both switches utilize nylon for their bottom housing, the resulting bottom-out sound will be similar, as nylon’s softness absorbs sound and creates a fuller profile in both cases. Thus, while distinct in their upper acoustic characteristics, the FJ400 and Durock Koala share a common ground through the nylon material, which centralizes some aspects of the typing experience despite their differences in aesthetic and light transmission capabilities.

Weight

The HMX FJ400 linear switch and the Durock Koala tactile switch present different characteristics in terms of actuation and bottom out forces, which are important factors for users’ typing experiences. The FJ400 has an actuation force of 50 grams and a bottom out force of 58 grams, categorizing it as a medium force switch, suitable for longer typing sessions due to its lighter actuation. In contrast, the Koala does not have a defined actuation force, but its bottom out force is 67 grams, placing it in the medium-heavy category. This suggests that while the FJ400 is the lighter option, making it preferable for those who favor ease during extended use, the Koala may appeal to users who enjoy a heavier push for a more substantial feeling when typing. Overall, users will find that the FJ400 is better for prolonged typing without fatigue, while the Koala suits those who prefer a firmer keystroke experience.

Travel distance

When comparing the travel distances of the HMX FJ400 linear switch and the Durock Koala tactile switch, we find a notable difference. The FJ400 features a travel distance of 3.8 mm, while the Koala has a slightly longer travel distance of 4 mm. As a result, those who favor a more responsive feel might gravitate towards the FJ400 due to its shorter travel distance, which can enhance quick keystrokes, especially for gaming. Conversely, the Koala's travel distance caters to those who appreciate a deeper keystroke, providing a more pronounced tactile feedback. Ultimately, choosing between these switches will depend on personal preference for either quicker responses or a more substantial keypress experience.

Price comparison

Typing experience

In terms of sound, the HMX FJ400 linear switch delivers a balanced profile that positions it as a versatile option, suitable for a variety of environments whether at home or in a workplace setting. This level of neutrality allows users to enjoy a typing experience that isn't overly intrusive or quiet, making it a reliable choice for typing without distraction. On the other hand, the Durock Koala tactile switch possesses a low-pitched and neutral sound that combines a mild resonance with a robust auditory signature. While the Koala's compact sound profile still provides the gratifying experience of tactile feedback, it maintains a manageable volume level that won’t disrupt those nearby, making it equally viable for both casual and professional use.

When it comes to feel, the FJ400 league allows for a seamless typing experience with a smooth actuation that emphasizes its linear design. This provides users with a consistent key travel experience that eliminates sudden interruptions common in tactile or clicky switches. Conversely, the Koala tactile switch stands out with its polished finish, resulting in a refined feel highlighted by its stepped tactility. The tactility is accentuated but not overwhelming, providing just the right amount of feedback to inform the typist without being overly stimulating. The Koala also offers a stiffness that demands a bit more force to actuate and bottom out compared to lighter switches, giving users a sense of control as they engage with their keyboard.

In summary, both the HMX FJ400 and the Durock Koala switches deliver unique yet balanced sound and feel characteristics suitable for different typing preferences. The FJ400 is tailored for those who appreciate smooth, unobtrusive linear action, while the Koala offers a refined tactile experience with a satisfying bump and a textured feel. Users can expect a courteous auditory interaction from both switches, as well as pleasurable feedback, allowing for a personalized typing experience regardless of which switch they choose.

Conclusion

To conclude, your choice between the HMX FJ400 linear switch and the Durock Koala tactile switch largely depends on your typing preferences and the specific applications in mind. If you favor a smooth, uninterrupted keystroke and plan to use your keyboard for extensive typing or gaming sessions, the FJ400’s medium bottom-out force of 58 grams and balanced sound profile will likely suit your needs well. Its design allows for a seamless experience, ideal for those who appreciate the quietude and fluidity of a linear switch. On the other hand, if you prefer a noticeable tactile feedback with some resistance—as well as a more pronounced sound profile—the Durock Koala would be more appealing. The Koala’s medium-heavy bottom-out force of 67 grams, combined with its stepped tactility, delivers a satisfying bump without overpowering your fingers, making it an excellent choice for both typing and gaming where you enjoy a bit of a punch in your keystrokes. Ultimately, your decision should reflect what kind of feedback and experience you seek—smoothness with the FJ400 or tactile distinction with the Koala.

Mentioned in this article

HMX FJ400 Linear

$3.50

$3.29 per 10

Learn more

Durock Koala Tactile

$5.50

$4.21 per 10

Learn more