HMX FJ400 vs. Durock Lupine
An in-depth look at the HMX FJ400 and the Durock Lupine switches—which one is the best fit for you?
Overview
When it comes to selecting the perfect mechanical keyboard switch, the choice between the HMX FJ400 and the Durock Lupine offers distinct advantages that cater to different typing preferences. The FJ400, celebrated for its balanced sound profile, finds itself as the middle ground of the HMX Film switch lineup, making it an excellent option for users seeking a harmonious blend of sound and feel without any overwhelming characteristics. On the other hand, the Durock Lupine excites typists with its two-stage long springs, delivering a seamless and consistent weight distribution during keystrokes that culminates in a satisfying and pronounced rebound. The classic clacky sound profile of the Lupine adds an element of auditory feedback that many find appealing for both gaming and typing. Ultimately, the choice between these two linear switches depends on whether you prioritize a more subdued experience with the FJ400 or the engaging, dynamic feel of the Lupine. However, let's dive in a bit deeper beyond generalities so you can best decide on the optimal switch for your needs.
By the numbers
Technical specifications
Actuation force
50g
Actuation force
N/A
Bottom-out force
58g
Bottom-out force
62g
Pre-travel
2.00 mm
Pre-travel
2.00 mm
Total travel
3.80 mm
Total travel
3.70 mm
Factory lubed
Yes
Factory lubed
Yes
Stem construction
Standard
Stem construction
Partial box
Stem material
T2
Stem material
POM
Top housing material
POM
Top housing material
Polycarbonate
Bottom housing material
Nylon
Bottom housing material
Nylon
Mount type
PCB (5-pin)
Mount type
PCB (5-pin)
Spring
22mm single-stage spring
Spring
Two-stage long spring
Housing materials
The HMX FJ400 and the Durock Lupine each incorporate distinct materials in their top housings, which significantly influences their sound profiles. The FJ400 features a POM top housing, known for creating a pleasing, deeper sound that is somewhat muted. This contrasts sharply with the Lupine's polycarbonate top housing, which produces a sharper and crisper sound due to its stiffness. Polycarbonate's translucency also enhances RGB lighting effects, making it a visually appealing choice for gamers who wish to showcase their setups. Thus, while both switches aim to deliver a unique auditory experience, they do so from fundamentally different acoustic perspectives, thanks to their choice of housing materials.
Both the FJ400 and Lupine share the commonality of using nylon for their bottom housings, which dictates a deeper and fuller sound profile. Nylon’s softer properties help absorb sound, contributing to a duller and rounder tone, allowing for improved auditory discretion during typing sessions. As such, even though the top housing materials differ significantly between the two models, the bottom housings ensure that both switches maintain a sense of acoustic warmth and comfort in both performance and user experience. This shared design element allows potential users of either model to expect a certain level of auditory consistency through the impact of nylon on sound absorption.
Ultimately, the interplay between the differing top housing materials and the common bottom housing offers a rich tapestry of sound characteristics for both the HMX FJ400 and Durock Lupine. The FJ400’s POM top housing dampens sounds, whereas the Lupine’s polycarbonate top housing amplifies them, creating a unique blend of auditory properties when combined with the nylon bottom. When both switches are used, the user will experience a depth and fullness in sound with nylon, enhanced differently by the top materials, ensuring the end result is a tailored auditory feedback experience. Thus, regardless of the top choices, these models can ultimately provide agreeable sound profiles that cater to varying preferences in typing dynamics.
Weight
When comparing the HMX FJ400 linear switch and the Durock Lupine linear switch, there are some notable differences in terms of actuation force and bottom out force. The FJ400 has a specific actuation force of 50 grams and a bottom out force of 58 grams, which positions it as a medium-force switch. In contrast, the Durock Lupine lacks a specified actuation force but has a bottom out force of 62 grams, also classified as medium. Consequently, the FJ400 provides a clearer sense of how much force is needed to actuate a keystroke. In terms of overall weight, the FJ400 is the lighter option due to its lower actuation force. For users who prefer a lighter switch for extended typing or gaming sessions, the FJ400 would be a better fit, while those who favor a more substantial feel may gravitate towards the heavier bottom out force of the Lupine. Despite both being medium-force switches, the distinct weights suggest that the two may cater to different preferences in typing experience.
Travel distance
When examining the travel distances of the HMX FJ400 linear switch and the Durock Lupine linear switch, it becomes evident that they offer slightly different experiences. The FJ400 has a travel distance of 3.8 mm, while the Lupine measures at 3.7 mm. This marginal difference indicates that the FJ400 is the longer switch, providing a more pronounced depth when pressed, which might appeal to users who favor a more substantial feel under their fingers. On the other hand, the Lupine, with its shorter 3.7 mm travel distance, may cater to those who value quicker responsiveness, making it a favorable choice for gamers seeking rapid action. Despite the difference being only 0.1 mm, for users accustomed to traditional travel distances of around 4.0 mm, both switches will feel relatively shallow. Ultimately, the choice between the two will depend on personal preference regarding the trade-off between depth and responsiveness.
Price comparison
Which switch is more bang for your buck?
The HMX FJ400 has an MSRP of $3.50 per 10 switches. At Milktooth, we are able to pass on savings to our customers and offer the FJ400 for $3.29.
The Durock Lupine has an MSRP of $5.50 per 10 switches. At Milktooth, we are able to pass on savings to our customers and offer the Lupine for $4.25.
Here at Milktooth, we offer the best prices on switches (on average, 27% lower the competition). In addition, we offer free shipping on orders over $49.00. We also offer free returns and exchanges, so you can shop with guaranteed satisfaction.
That said, while price is an important piece of the puzzle, our opinion is that you should ultimately pick the option that most suits your unique preferences since you’ll be using these switches for years to come. In other words, finding something perfect for you is, in our view, the most important criteria.
Typing experience
When it comes to sound, the HMX FJ400 linear switch is noted for its balanced sound profile, making it suitable for those who want a versatile auditory experience. This neutrality is advantageous as it accommodates a wide range of environments, whether you’re working from home or in a shared space. In contrast, the Durock Lupine switch delivers a unique auditory experience characterized by a combination of neutral and high-pitched sound qualities. The clacky sound profile adds a distinct sharpness to keypresses, which can be particularly appealing to users who prefer a more engaging typing sound. Ultimately, while both switches provide admirable auditory experiences, the FJ400 leans towards a balanced tone while the Lupine stands out with its brighter, crisper sound.
In terms of feel, the FJ400 is recognized for offering a smooth typing experience, though specific details about its tactile qualities remain unspecified. On the other hand, the Durock Lupine switch features two-stage long springs that provide a careful balance of consistent weight during key presses as well as a powerful rebound. This allows for a user experience that is described as both mild and polished, making it approachable for beginners while also satisfying advanced users seeking smooth, refined key travel. While the FJ400’s exact feel characteristics are uncertain, it’s clear that the Lupine’s design facilitates a more dynamic typing sensation, combining gentle feedback with a refined finish.
In conclusion, both the HMX FJ400 and Durock Lupine linear switches offer unique sound and feel characteristics that cater to different preferences. The FJ400 shines with its balanced sound and unspecified smooth feel, making it a versatile choice for various settings. Meanwhile, the Lupine captivates with its engaging audio signature and sophisticated typing sensation, thanks to its innovative spring design. Whether you are drawn to the neutral balance of the FJ400 or the lively response of the Lupine, both switches provide satisfying experiences that can be tailored to your personal taste and typing style.
Conclusion
In conclusion, choosing between the HMX FJ400 and the Durock Lupine linear switches ultimately depends on your specific preferences and intended use. If you value a balanced sound profile and a moderate actuation force, the FJ400 is a solid choice, especially if you're looking for a versatile switch that can perform well for both gaming and typing at home or in the office. Its medium bottom-out force of 58 grams provides a comfortable typing experience without being too taxing on your fingers. On the other hand, if you prefer a more engaging typing experience with a strong rebound and appreciate the nuances of a two-stage spring design, the Durock Lupine may be right for you. With a slightly higher bottom-out force of 62 grams, the Lupine offers a clacky sound profile that will appeal to those who enjoy a distinct auditory feedback while typing. Its polished feel and mild characteristics make it approachable for a wide range of users, including beginners. In the end, consider what aspects are most important to you—whether that be sound, feel, or the overall typing experience—and select the switch that aligns best with your preferences.
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