HMX FJ400 vs. Gazzew U4

Overview

When exploring the world of mechanical keyboard switches, two prominent contenders are the HMX FJ400 linear switch and the Gazzew U4 tactile switch. The FJ400, known for its balanced sound profile, serves as a versatile middle ground within the HMX Film switch lineup, making it a solid choice for users seeking smooth keystrokes without distracting noise. In contrast, the Gazzew U4 features a sharp and exhilarating tactile bump, providing a more dynamic typing experience complemented by a plush bottom-out sensation that feels both satisfying and quiet. While the FJ400 appeals to those who prioritize speed and fluidity, the U4 attracts users who enjoy tactile feedback and a whisper-quiet operation. However, let's dive in a bit deeper beyond generalities so you can best decide on the right switch for you.

By the numbers

HMX FJ400 Linear

Gazzew U4 Tactile

$3.50

$3.29 per 10

$6.50 per 10

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Housing materials

The housing materials of the HMX FJ400 and the Gazzew U4 switches reveal both similarities and distinctive characteristics that contribute to their overall sound profiles. The FJ400 employs a polyoxymethylene (POM) top housing, known for creating a unique sound that is deeper and more muted. In contrast, the U4 features a proprietary plastic blend referred to as "boba plastic" for its top housing, which also delivers a rich and deep sound profile due to its softness. While both materials focus on producing satisfying auditory experiences, the specific compositions may lead to nuanced differences in sound quality. Each switch, therefore, uses plastics that favor lower frequencies, ensuring that when pressed, both switches provide an aural experience that is full and resonant.

When examining the bottom housings of the FJ400 and U4, a similar trend emerges. The FJ400 utilizes a nylon bottom housing, a classic material revered for its ability to yield a deep and full sound. This is a result of nylon's relatively softer plastic properties, which absorb sound and create a pleasant dullness. Conversely, the Gazzew U4 integrates its proprietary "boba plastic" for the bottom housing. This choice complements the rich and deep sound profile established by its top housing. Both switches seem to share the objective of optimizing sound qualities through housing materials that are less rigid, thereby reinforcing the depth and fullness characteristic of their performance.

Crucially, the combined design of the housing structures in both switches illustrates how they can produce similar sound experiences despite their differences. The bottom housing of each switch plays a significant role in determining the bottom-out sound and tactile feel, while the top housing primarily influences the sound released as the key is released. This division of acoustic responsibilities suggests that whether using the softer nylon and POM combination of the FJ400 or the dual "boba plastic" construction of the U4, users can expect a satisfying auditory response when typing. Ultimately, regardless of individual materials, a consistent goal is achieved: to deliver an engaging and rich sound profile that enhances the overall typing experience.

Weight

When comparing the actuation force and bottom out force of the HMX FJ400 linear switch to the Gazzew U4 tactile switch, there are some noteworthy differences. The FJ400 features an actuation force of 50 grams and a bottom out force of 58 grams, while the U4 provides a slightly lighter actuation force of 45 grams but has a higher bottom out force of 62 grams. This means that while the U4 requires less effort to actuate a keystroke, it will feel heavier when pressed all the way down compared to the FJ400. Therefore, users who prefer a lighter switch for extended typing sessions may gravitate towards the Gazzew U4, while those who appreciate a more substantial push might opt for the FJ400. In summary, the FJ400 is the heavier switch in terms of actuation force, whereas the U4 is lighter, providing a unique typing experience for different preferences.

Travel distance

When comparing the travel distances of the HMX FJ400 linear switch and the Gazzew U4 tactile switch, we observe that the FJ400 has a travel distance of 3.8 mm, while the U4 measures slightly less at 3.6 mm. This difference makes the FJ400 the longer travel switch, which may appeal to users who prefer a more substantial feel when pressing down on keys. In contrast, the shorter travel distance of the U4 can provide a quicker response time, making it potentially more attractive to gamers or those who prioritize speed in their typing experience. Both switches cater to different preferences; if you favor a deeper and more deliberate actuation, the FJ400 would be the better choice, whereas if you seek a snappier feel, the U4's shorter distance could be ideal.

Price comparison

Typing experience

The sound profile of the HMX FJ400 linear switch is characterized as balanced, which suggests a moderate level of noise that falls between louder, more pronounced switches and quieter ones. This makes it suitable for a variety of typing environments where the sound isn't likely to be disruptive. In contrast, the Gazzew U4 tactile switch offers a distinctly muted acoustic signature. The U4 produces a subdued sound, minimizing the clack commonly associated with mechanical switches, and features a low-pitched tone that adds a sense of warmth to the typing experience. Together, these contrasting sound profiles cater to different preferences: the FJ400's balance allows for everyday use without being overly intrusive, while the U4 presents a more subtle auditory experience ideal for quieter settings.

In terms of feel, the FJ400’s characteristics remain unspecified, but the Gazzew U4 tactile switch is known for its sharp, tactile bump. This means that users can expect an intense and highly pronounced feedback with each keystroke, creating a vivid typing sensation. The combination of this prominent tactile feedback and a plush bottom-out feeling enhances the overall experience, making each press satisfying. While the feel of the FJ400 remains unknown, if it is designed for versatility, it could potentially offer a smooth and linear experience, contrasting with the pronounced tactile sensations of the U4.

Overall, the HMX FJ400 linear switch and the Gazzew U4 tactile switch offer distinct experiences tailored to different typing preferences. The FJ400 presents a balanced sound that fits a variety of environments, while the U4 provides a whisper-quiet operation with a sharp tactile feedback that is ideal for those who enjoy a pronounced sensation with each keypress. Selecting between these switches ultimately depends on whether users prioritize sound dampening and tactile feedback or favor a more universal sound profile.

Conclusion

To conclude, when deciding between the HMX FJ400 linear switch and the Gazzew U4 tactile switch, consider your typing preferences and the environment in which you’ll be using your keyboard. If you seek a balanced typing experience that offers an even sound profile and requires less force to actuate, the FJ400 is a solid choice. Its medium bottom-out force of 58 grams makes it a versatile option for both typing and gaming, ideal for those who appreciate a smoother keystroke without the distinct tactile feedback. On the other hand, if you are someone who values a pronounced tactile response with a plush bottom-out feel, the Gazzew U4 is likely the better fit. Its sharp tactile bump at a slightly higher bottom-out force of 62 grams delivers an exhilarating feedback experience, perfect for tasks that benefit from clear actuation cues, such as typing or programming. Additionally, its muted and low-pitched sound profile allows you to enjoy a quiet typing experience, making it a great choice for shared spaces or late-night use. Ultimately, your choice should align with whether you prioritize a linear feel for smoothness or a tactile response for feedback.

Mentioned in this article

HMX FJ400 Linear

$3.50

$3.29 per 10

Learn more

Gazzew U4 Tactile

$6.50 per 10

Learn more