HMX FJ400 vs. KTT Grapefruit

Overview

When it comes to mechanical keyboard switches, the choice often boils down to personal preference, particularly between options like the HMX FJ400 and the KTT Grapefruit. The FJ400 is celebrated for its balanced sound profile, making it an excellent choice for those who appreciate a more neutral auditory experience while typing. As a middle ground in the HMX Film switch lineup, it provides a reliable tactile feedback without overwhelming noise, appealing to both casual users and those who spend long hours typing. On the other hand, the KTT Grapefruit switches bring a unique flair with their soft and light feel, coupled with a low-pitched yet defined sound that sets them apart. Characterized as 'Low-pitched', 'Neutral', and 'Polished', they offer a smooth typing experience that some users might find more enjoyable for gaming or extended typing sessions. While both linear switches have their own merits, the choice ultimately hinges on which characteristics align more closely with your typing style and sound preference. 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 Grapefruit Linear

$3.50

$3.29 per 10

$3.41 per 10

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Housing materials

The housing materials of the HMX FJ400 and KTT Grapefruit switches showcase both distinct contrasts and interesting similarities that ultimately affect their acoustic profiles. The FJ400 features a POM (Polyoxymethylene) top housing, known for producing a unique and muted sound profile that leans towards the deeper end of the spectrum. This characteristic often creates a more rounded auditory experience when typing. In contrast, the Grapefruit employs a polycarbonate top housing, which is generally stiffer and results in a sharper, higher-pitched sound. This difference in the top housing material reflects how each switch interacts with sound waves; while the FJ400 provides a mellow tone, the Grapefruit offers a crisper and more resonant output. If RGB lighting is a factor in the application, the Grapefruit's polycarbonate top's translucency allows for optimal light diffusion, unlike the less light-permeable POM.

Despite the contrasting top housing materials, both switches share nylon as their bottom housing component. Nylon is well-regarded in the keyboard community due to its ability to absorb sound, contributing to the deeper and fuller sound profile experienced when typing. The fact that both the FJ400 and the Grapefruit utilize nylon in the bottom housing means that users may find a similar type of auditory experience at the base of each keystroke. While the FJ400's nylon housing works in conjunction with its POM top for a more subdued sound, both switches benefit from the sound-absorbing qualities of nylon, leading to a certain uniformity in the bottom-out experience of the switches.

In sum, the HMX FJ400 and KTT Grapefruit switches differ primarily in their top housing materials, leading to variations in sound profiles—one being muted and deep, the other sharper and crisper. However, the nylon bottom housing in both models plays a crucial role in creating a fuller typing experience. This means that, while users will notice distinct differences when activating each switch, especially with regard to the release sound and feel, the underlying deep and rounded sound will resonate throughout both switches due to their common nylon construction. Thus, while each switch has its unique characteristics, the shared elements of the nylon bottom housing ensure a level of familiarity and consistency in performance.

Weight

When comparing the HMX FJ400 linear switch to the KTT Grapefruit linear switch, there are notable distinctions in both actuation force and bottom out force. The FJ400 features an actuation force of 50 grams and a bottom out force of 58 grams, making it a medium-weight switch. In contrast, the Grapefruit has a lighter actuation force of 45 grams and a bottom out force of 53 grams, categorizing it as medium-light. This means that users who prefer a lighter switch for prolonged typing sessions or gaming might lean towards the Grapefruit, while those looking for a more substantial typing experience with a stronger push feel might favor the FJ400 due to its heavier forces. Overall, the Grapefruit is the lighter option, while the FJ400 is the heavier one, offering different tactile experiences based on user preference.

Travel distance

When comparing the travel distances of the HMX FJ400 linear switch and the KTT Grapefruit linear switch, there is a distinct difference. The FJ400 has a travel distance of 3.8 mm, while the Grapefruit measures 4 mm. This makes the FJ400 the shorter of the two options, suitable for users seeking faster response times, such as gamers who benefit from more immediate key actions. In contrast, the Grapefruit's longer travel distance of 4 mm offers a more traditional feel that provides a sense of depth, which some users may find preferable for a fuller typing experience. Therefore, if you prioritize responsiveness and a quicker actuation, the FJ400 is the better choice, whereas if you enjoy a more robust and deeper keystroke, the Grapefruit is likely to be more satisfying.

Price comparison

Typing experience

When it comes to sound, the HMX FJ400 linear switch offers a balanced profile, making it well-suited for both casual typing and more focused work environments. This provides a pleasing auditory experience without overwhelming distractions, giving users a consistent sound that is neither too sharp nor too dull. In contrast, the KTT Grapefruit linear switch presents a low-pitched, mellow tone that leans towards a deeper sound profile described as “baritone.” While the Grapefruit has a musicality that can age nicely, it maintains a clean neutrality that ensures it won't dominate your auditory space whether you're in a shared office or at home, making it versatile for varied applications.

In terms of feel, the FJ400 is positioned as a middle ground within the HMX Film switch lineup, suggesting a well-balanced typing experience, but the specifics of its tactile feedback remain unspecified. On the other hand, the KTT Grapefruit switch is characterized by its polished finish, which results in a remarkably smooth typing experience with reduced friction and seamless key travel. The softer, lighter feel of the Grapefruit adds to its refined usability, distinguishing it as a switch that caters to prolonged typing sessions with minimal fatigue.

In conclusion, while the HMX FJ400 switch offers a balanced sound profile with an unspecified feel likely to appeal to a wide range of users, the KTT Grapefruit linear switch is defined by its soft, polished feel and unique baritone sound. If users are looking for a smooth typing experience with an emphasis on deeper auditory qualities, the Grapefruit will provide that standout sensation. Conversely, those who prefer a more neutral auditory experience may gravitate more towards the FJ400 without feeling compromised in performance. Ultimately, your choice may align closely with your personal preferences in sound and feel, but both switches offer distinct benefits that can enhance your typing experience.

Conclusion

To conclude, your choice between the HMX FJ400 and the KTT Grapefruit linear switches will largely depend on your personal preferences for feel and sound profile. If you prefer a balanced sound and a slightly firmer typing experience, the FJ400, with its 58g actuation force, might be the better option for you. This switch is ideal for those who appreciate a medium resistance and are looking for a versatile switch that performs well in both gaming and typing scenarios. On the other hand, if you like a lighter, smoother feel with a deeper, low-pitched sound profile, the KTT Grapefruit, with its 53g actuation force, may suit you better. These switches are particularly appealing if you enjoy a soft touch while typing and appreciate a mellow auditory experience, making them great for extended typing sessions or quieter environments. Ultimately, you should consider not only how each switch feels under your fingers but also the acoustic environment in which you'll be using them, as both switches bring distinct qualities that cater to diverse preferences.

Mentioned in this article

HMX FJ400 Linear

$3.50

$3.29 per 10

Learn more

KTT Grapefruit Linear

$3.41 per 10

Learn more