HMX FJ400 vs. Dareu Sky V4

Overview

When choosing a mechanical keyboard switch, the HMX FJ400 and the Dareu Sky V4 stand out as compelling linear options, each catering to different preferences and typing styles. The HMX FJ400 is celebrated for its balanced sound profile, making it an appealing choice for users seeking a versatile switch that strikes a middleground between comfort and acoustics. In contrast, the Dareu Sky V4 sets itself apart with its innovative use of POK material in the top housing, resulting in a deeper sound signature that enhances its smooth linear action. This switch is particularly favored by typists who appreciate a richer auditory experience, characterized by its thocky, neutral, low-pitched, and bouncy qualities. While both switches offer linear responsiveness and a satisfying typing experience, their distinct acoustic profiles will resonate differently with users. However, let's dive in a bit deeper beyond generalities so you can best decide on the switch that suits your needs.

By the numbers

HMX FJ400 Linear

Dareu Sky V4 Linear

$3.50

$3.29 per 10

$7.78

$4.76 per 10

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Housing materials

The HMX FJ400 and the Dareu Sky V4 exhibit notable differences in their top housing materials, which significantly influences their acoustic properties and tactile responses. The FJ400 utilizes a POM (Polyoxymethylene) top housing known for producing a deeper, muted sound profile that many users find appealing for its unique auditory characteristics. This material effectively promotes a distinct sound signature but may not provide the smoothest tactile experience available. Conversely, the Sky V4 leverages POK (Polyketone) for its top housing, which boasts a lower coefficient of friction, enhancing the overall smoothness in operation. While the FJ400 delivers a focused auditory experience, the Sky V4 offers a blend of smoothness and a more clacky sound, showcasing how different materials impact the auditory feedback during use.

When examining their bottom housing, both the FJ400 and the Sky V4 utilize nylon, a classic switch housing material celebrated for its ability to produce a deeper and fuller sound profile. This softness allows the nylon to absorb more sound compared to harder plastics, contributing to a rounder acoustic characteristic that is consistent between the two models. Despite the differences in their top housings, the shared nylon bottom housing means that the overall sound experience when bottoming out will feel similar for both switches. Users can expect a satisfying depth and fullness in sound when typing, regardless of the variations introduced by each top housing material.

Moreover, the inherent properties of the FJ400 and Sky V4 demonstrate how switching the top housing material can create distinct user experiences while still achieving some sound and feel commonality thanks to the nylon bottom. The interaction between POM and POK with nylon results in a complex sound profile that depends on how the switch is engaged and released. The FJ400 may offer a more subdued release sound due to its POM top, while the Sky V4 capitalizes on a smoother tactile feel with a more pronounced clack from the POK top. Ultimately, while users may appreciate the unique attributes of each model based on their top housing, they can still expect a comparable depth of sound and feel when typing due to the shared nylon bottom housing.

Weight

When comparing the HMX FJ400 linear switch with the Dareu Sky V4 linear switch, the differences in actuation and bottom out forces reveal distinct characteristics suited for different preferences. The FJ400 features an actuation force of 50 grams and a bottom out force of 58 grams, making it the heavier option of the two. In contrast, the Sky V4 has a lower actuation force of 45 grams and a bottom out force of 55 grams, categorizing it as medium-light. This means the Sky V4 may be more comfortable for extended typing sessions or gaming, appealing to users who favor a lighter touch. Conversely, the FJ400's higher forces provide a more substantial feel, which some users might prefer for a more impactful typing experience. Overall, while both switches are in the medium range, the FJ400 is the heavier choice, and the Sky V4 offers a lighter alternative.

Travel distance

When comparing the travel distances of the HMX FJ400 and the Dareu Sky V4 linear switches, there is a distinct difference that may impact user preference. The FJ400 features a travel distance of 3.8 mm, while the Sky V4 has a slightly shorter travel distance of 3.6 mm. This means that users opting for the FJ400 will experience a deeper and potentially more substantial keystroke, which may appeal to those who prefer a more pronounced feedback from their keys. On the other hand, the Sky V4’s shorter travel distance could provide a quicker response time, making it a favorable choice for gamers who prioritize speed and agility in their typing or gaming experience. Ultimately, the choice between these switches will depend on individual preferences for key feel and responsiveness, with the FJ400 being the longer option and the Sky V4 offering a shorter, more rapid keystroke.

Price comparison

Typing experience

The HMX FJ400 switch presents a balanced sound profile that caters to a variety of typing environments, making it versatile for both casual and professional use. In contrast, the Dareu Sky V4 linear switch offers a deeper sound signature enhanced by the POK material in its top housing. This construction results in a thocky quality, characterized by a rich and satisfying auditory experience that can resonate well with typists who appreciate a pronounced acoustic feedback. While the FJ400 maintains a more neutral sound, the Sky V4's low-pitched and thocky nature provides a distinct auditory presence that some may find more enjoyable during extensive typing sessions.

When it comes to tactile feel, the FJ400 switch lacks specific descriptors in the provided information, leaving its character more ambiguous. The Sky V4, however, is known for its bouncy feel, giving users a spring-like and elastic feedback sensation upon pressing the keys. This bounce can contribute to a lively typing experience, making actions feel more dynamic and responsive. If the FJ400 feels similar to other balanced switches, users can expect a generally agreeable sensation, but the absence of specificity leaves some uncertainty.

Taken together, the HMX FJ400 and Dareu Sky V4 linear switches each bring unique auditory and tactile experiences to the table. While the FJ400 offers a balanced sound profile that suits most typing scenarios, the Sky V4 excels with its thocky and deep auditory quality. In terms of feel, the active bounciness of the Sky V4 provides a more lively experience, contrasting with the less defined feel of the FJ400. Depending on personal preference and typing style, both switches can yield satisfactory results; choosing between them may ultimately hinge on whether one favors a rich auditory experience or a lively tactile feedback.

Conclusion

To conclude, your choice between the HMX FJ400 linear switch and the Dareu Sky V4 linear switch ultimately depends on your preferences and intended use. If you prefer a moderately heavy switch with a balanced sound profile that suits both typing and gaming, the FJ400 might be the best choice for you. Its medium bottom-out force of 58 grams provides a solid feel, making it ideal for users who enjoy tactile feedback without being overly soft or tiring during extended use. On the other hand, if you are seeking a lighter feel and a more dynamic typing experience, the Sky V4, with its medium-light bottom-out force of 55 grams, may be more appealing. Its unique POK material top housing offers a deeper, thocky sound signature and a bouncy feedback that is especially enjoyable for typists who appreciate a lively and satisfying keystroke. Ultimately, whether you prioritize sound, feel, or actuation force will guide you in selecting the right switch for your mechanical keyboard, ensuring that it aligns perfectly with your personal style and usage scenario.

Mentioned in this article

HMX FJ400 Linear

$3.50

$3.29 per 10

Learn more

Dareu Sky V4 Linear

$7.78

$4.76 per 10

Learn more