HMX FJ400 vs. KTT Semi Mute

Overview

When considering the ideal mechanical keyboard switch, the HMX FJ400 and KTT Semi Mute both present compelling options, each with its own unique characteristics. The FJ400 serves as the middle ground in the HMX Film switch lineup, offering a balanced sound profile that caters to users who appreciate auditory feedback without overwhelming sound. By contrast, the KTT Semi Mute switches, despite their name suggesting a mere reduction in sound, are designed to deliver an entirely silent typing experience, making them perfect for those who prioritize a noise-free environment, particularly during late-night typing sessions. The Semi Mute's advanced dampening technology enhances the typing feel, resulting in a buttery, mild, and delightfully comfortable experience. While both switches appeal to linear switch enthusiasts, the choice between the balanced FJ400 and the whisper-quiet Semi Mute ultimately depends on individual preferences for sound and feel. 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 Semi Mute Linear

$3.50

$3.29 per 10

$3.97

$3.55 per 10

Learn moreLearn more

Housing materials

When comparing the housing materials of the HMX FJ400 and KTT Semi Mute, there are distinct differences between the two in both the top and bottom housings, leading to varied sound profiles. The FJ400 utilizes a POM (Polyoxymethylene) material for its top housing, which is known for producing a sound that is deeper and more muted. This unique characteristic comes from POM's inherent ability to absorb sound waves, creating a fuller auditory experience. In contrast, the Semi Mute features a polycarbonate top housing that gives off a crisper and higher-pitched sound profile. Polycarbonate's stiffer properties enhance resonance, resulting in a sharper acoustic response and making it particularly effective for RGB lighting applications due to its translucency.

The bottom housings further contribute to the overall sound characteristics of each switch. The FJ400 incorporates nylon for its bottom housing, a material that is traditional in switch construction and enhances the deeper, fuller sound profile that its top housing emphasizes. Because nylon is a softer plastic, it absorbs sound more effectively, contributing to a duller and rounder auditory experience when bottoming out on the switch. Conversely, the KTT Semi Mute employs polycarbonate for its bottom housing as well, mirroring the material used in its top section. This uniformity leads to a sharper, higher-pitched sound profile, as the stiffer nature of polycarbonate enhances clarity and resonance, thus creating a consistent sound signature across both the top and bottom housings.

Ultimately, while both switches utilize different materials for their housings, their sound profiles can yield similar results in certain applications. The impact of the bottom housing material is significant, as it shapes the bottom-out feel and sound, while the top housing primarily influences the release sound when a key is lifted. In specific use cases, such as typing or gaming where bottom-out sound is less noticeable, users may appreciate the pronounced crispness of the KTT Semi Mute’s polycarbonate across both housings. However, for those who prefer the deeper, more muted tones of the FJ400, the difference in sound profiles becomes more pronounced. When both switches are subjected to real-world usage, it's clear that despite their material differences, each can provide a satisfying auditory experience tailored to distinct preferences.

Weight

When comparing the HMX FJ400 linear switch and the KTT Semi Mute linear switch, there are notable differences in their actuation forces, despite both having the same bottom out force of 58 grams. The FJ400 requires a slightly heavier actuation force of 50 grams, while the Semi Mute is lighter at 43 grams. This difference may appeal to different preferences among users; those who favor a lighter touch might gravitate towards the Semi Mute for its ease of actuation, which can facilitate longer typing sessions with less fatigue. Conversely, typists who appreciate a more substantial feel might prefer the HMX FJ400, which provides a stronger engagement at the start of the keystroke. Ultimately, while both switches share an identical bottom out force indicating a similar endpoint, their differing actuation forces cater to varied typing experiences, with the Semi Mute being the lighter option and the FJ400 being the heavier one.

Travel distance

When comparing the travel distances of the HMX FJ400 linear switch and the KTT Semi Mute linear switch, a notable difference emerges. The FJ400 features a travel distance of 3.8 mm, making it the shorter option, while the Semi Mute offers a travel distance of 4 mm, which is slightly longer. This means that users of the FJ400 may enjoy a more responsive feel that caters to faster keystrokes, ideal for gamers seeking quick action. On the other hand, the Semi Mute's 4 mm travel distance provides a more substantial depth that some users may prefer for a fuller typing experience. Thus, individuals who appreciate a balance between speed and tactile feedback might lean towards the longer travel distance of the Semi Mute, whereas those who prioritize quick response times could opt for the FJ400.

Price comparison

Typing experience

The sound profile of the HMX FJ400 linear switch is characterized as balanced, which makes it a versatile option for users who may need a mix of quiet operation without sacrificing the pleasure of hearing the mechanical actuation. On the other hand, the KTT Semi Mute switch is specifically designed for silence, providing a thoroughly muted experience that minimizes typical mechanical keyboard sounds. This makes the Semi Mute an excellent choice for those who desire an absolutely noise-free environment, especially suitable for late-night work or gaming sessions. While both switches can deliver a satisfying experience, the FJ400 leans towards a more audible yet pleasant sound, whereas the Semi Mute prioritizes complete silence.

When it comes to feel, the FJ400 switch is positioned as an industry middle-ground, which generally suggests a balanced actuation force and overall tactile experience. In contrast, the KTT Semi Mute switch boasts a buttery feel, offering a smooth and fluid keystroke experience that enhances typing comfort. Additionally, the Semi Mute’s mild characteristics provide a gentle yet pleasant touch, making it approachable for both beginners and seasoned typists. Thus, while the FJ400 might offer a satisfactory typing experience for most, the buttery and mild feel of the Semi Mute could provide a more gratifying sensation for users who prioritize a seamless keypress.

In conclusion, the HMX FJ400 linear switch presents a balanced sound profile and a middle-ground feel, making it suitable for a variety of users seeking comfort and moderate auditory feedback. In contrast, the KTT Semi Mute offers a deeply muted sound and an extraordinarily smooth typing sensation that is ideal for those in need of a completely silent experience. Depending on your preference for sound and tactile feedback, both options can provide a fulfilling mechanical keyboard experience, each excelling in its own domain.

Conclusion

To sum up, when choosing between the HMX FJ400 linear switch and the KTT Semi Mute linear switch, it ultimately depends on your specific typing environment and personal preferences. If you are looking for a balanced sound profile and a versatile keystroke that suits a variety of settings, the FJ400 proves to be an excellent option. This switch caters well to both casual and professional settings, making it ideal for users who prioritize a more traditional typing feel without excessive noise. On the other hand, if your priority is to maintain a completely silent typing experience—perhaps for late-night gaming sessions or work in shared spaces—the KTT Semi Mute linear switch is your best bet. With its advanced dampening technology, these switches provide a buttery and mild typing experience that minimizes distraction, allowing you to type away without disturbing others or compromising your concentration. Thus, your choice boils down to whether you value a balanced typing feel or a focused, silent arsenal to support your keyboard activities.

Mentioned in this article

HMX FJ400 Linear

$3.50

$3.29 per 10

Learn more

KTT Semi Mute Linear

$3.97

$3.55 per 10

Learn more