HMX FJ400 vs. KTT MoonRosa

Overview

When it comes to choosing the ideal mechanical keyboard switch, both the HMX FJ400 and the KTT MoonRosa offer compelling features tailored to different user preferences. The FJ400 stands out as a versatile middle ground in the HMX Film switch lineup, delivering a balanced sound profile that appeals to those who appreciate both tactile feedback and minimal noise. On the other hand, the KTT MoonRosa boasts an all-POM construction that ensures a buttery smooth typing experience, characterized by its low-pitched, easy-to-press feel that is perfect for gamers and typists who prioritize a seamless, fluid stroke. While each of these linear switches has its own strengths—whether it be the FJ400’s balanced acoustic signature or the MoonRosa's effortless keystrokes—your choice will depend on your specific typing style and sound preferences. 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

KTT MoonRosa Linear

$3.50

$3.29 per 10

$4.88 per 10

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Housing materials

When comparing the housing materials of the HMX FJ400 and the KTT MoonRosa, it is interesting to note that both utilize Polyoxymethylene (POM) for their top housings. This shared material contributes to a distinctly pleasing auditory experience, characterized by a deeper and more muted sound profile. Both switches derive their unique tonal qualities from the POM top housings, fostering a rich acoustic environment that emphasizes warmth and fullness. Consequently, users can expect similarly satisfying sound results when engaging with either switch, underscoring the likeness in their upper housing components.

In contrast, the bottom housing of the FJ400 is crafted from nylon, while the MoonRosa employs POM for this aspect as well. Nylon, being a softer plastic, excels in absorbing sound and thus offers a fuller auditory experience that leans toward a duller quality. This inherently influences the bottom-out sound of the FJ400, making it resonate differently compared to the MoonRosa’s POM bottom housing. The choice of materials in the bottom housing plays a crucial role in shaping the overall sound experience and tactile feedback when pressing down on a key, as the qualities of each material will affect how the switch feels and sounds during both actuation and release.

Together, these material choices combine to create distinct experiences for the FJ400 and MoonRosa. While both share POM in their top housing, the nylon bottom housing of the FJ400 provides a uniquely rich, round sound profile that contrasts with the MoonRosa’s more cohesive POM structure. This divergence highlights how the bottom housing contributes significantly to the character of each switch, with varying implications for sound and feel. Ultimately, users can appreciate the nuanced differences between the two switches while recognizing the fundamental similarities fostered by the POM top housing.

Weight

When comparing the HMX FJ400 linear switch and the KTT MoonRosa linear switch, there are notable differences in both actuation force and bottom out force. The FJ400 requires an actuation force of 50 grams and has a bottom out force of 58 grams, categorizing it as a medium-weight switch. In contrast, the MoonRosa is much lighter, with an actuation force of just 37 grams and a bottom out force of 45 grams. This lighter weight of the MoonRosa makes it more suitable for prolonged typing sessions, as it reduces fatigue during extensive use, perfect for those who need a portable keyboard for work or gaming. On the other hand, the FJ400, being heavier, provides a more substantial feel that some users may prefer for a more tactile typing experience. Therefore, while the FJ400 may appeal to users seeking a firmer response, the MoonRosa is ideal for those who prioritize lighter key presses.

Travel distance

The travel distance of the HMX FJ400 linear switch is 3.8 mm, while the KTT MoonRosa linear switch has a slightly shorter travel distance of 3.5 mm. This means that when pressing the keys, the FJ400 provides a deeper feel, which some users might prefer for its more substantial feedback, especially those who enjoy a hearty depth in their typing experience. On the other hand, the MoonRosa's shorter travel distance could offer quicker key presses, making it more appealing for gamers who prioritize response times. Therefore, if you favor a more responsive and rapid actuation, the KTT MoonRosa would be the better choice due to its shorter travel distance. In contrast, if you appreciate a more tactile experience with a more extended push, the HMX FJ400 may be the ideal option for you.

Price comparison

Typing experience

When comparing the sound profiles of the HMX FJ400 and the KTT MoonRosa linear switches, the FJ400 is known for its balanced sound profile, making it a versatile choice that sits comfortably between muted and pronounced audio feedback. In contrast, the MoonRosa switch offers a low-pitched sound signature, characterized by a bass-heavy, mellow tone that can create a more soothing auditory experience during typing. While both switches will produce unique audio characteristics shaped by the keyboard build and keycap choices, users who prefer a subdued yet rich sound might lean towards the MoonRosa, whereas those who crave a more balanced auditory feedback may find the FJ400 more appealing.

Regarding the tactile experience, the FJ400's specific feel characteristics are less detailed; however, it is part of a well-regarded switch lineup and is generally understood to offer a smooth typing motion. On the other hand, the MoonRosa is particularly lauded for its easy-to-press nature, which means minimal resistance is needed for key activation, resulting in a typing experience that is both effortless and comfortable. This can significantly reduce finger fatigue during prolonged typing sessions. Those seeking a more relaxed and responsive feel will likely prefer the MoonRosa, while the FJ400’s feel may still offer satisfaction but lacks the specific ease of activation detail.

In conclusion, both the HMX FJ400 and the KTT MoonRosa linear switches provide noteworthy characteristics that cater to different preferences among typists. The FJ400 stands out with its balanced sound profile and general smoothness, while the MoonRosa excels with its low-pitched sound and easy-to-press feel that enhances typing comfort. Depending on personal priorities, such as sound preference and typing ease, either switch can deliver an enjoyable typing experience, ensuring that newcomers can find a suitable option to fit their needs.

Conclusion

To conclude, when deciding between the HMX FJ400 linear switch and the KTT MoonRosa linear switch, your choice will largely depend on your typing preferences and intended use. If you prefer a medium bottom-out force and appreciate a balanced sound profile, the FJ400 might be the better fit for you. Its construction offers a good middle ground, making it suitable for both gaming and typing tasks, and it typically feels stable under your fingers. On the other hand, if you lean towards a lighter typing experience with minimal resistance, the MoonRosa could be more appealing. Its low actuation force and buttery smooth feel make it an excellent option for long typing sessions, especially if you prioritize comfort and a friendly touch. Additionally, the MoonRosa's low-pitched sound signature adds a mellow touch to your typing, which might enhance your overall experience. Ultimately, your decision should reflect what you value most in your typing experience—whether that’s a balanced feel and sound profile with the FJ400 or an effortless and gentle touch with the MoonRosa.

Mentioned in this article

HMX FJ400 Linear

$3.50

$3.29 per 10

Learn more

KTT MoonRosa Linear

$4.88 per 10

Learn more