HMX FJ400 vs. Aflion Shadow (Ink) Double Spring
An in-depth look at the HMX FJ400 and the Aflion Shadow (Ink) Double Spring switches—which one is the best fit for you?
Overview
When it comes to mechanical keyboard switches, the choice between a linear switch like the HMX FJ400 and a tactile switch such as the Aflion Shadow (Ink) Double Spring can significantly influence your typing experience. The FJ400 stands out as a versatile option in the HMX Film switch lineup, providing a balanced sound profile ideal for users who favor smooth keystrokes without the distraction of tactile feedback. In contrast, the Shadow (Ink) Double Spring is tailored for those who appreciate a pronounced tactile sensation; its medium-high tactility combined with a unique two-staged spring design delivers satisfying deep thocks that enhance the typing experience. While the FJ400 offers a more understated, fluid input, the Shadow focuses on engaging feedback that many typists find more rewarding. 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
Technical specifications
Actuation force
50g
Actuation force
55g
Bottom-out force
58g
Bottom-out force
63g
Pre-travel
2.00 mm
Pre-travel
2.00 mm
Total travel
3.80 mm
Total travel
4.00 mm
Factory lubed
Yes
Factory lubed
No
Stem construction
Standard
Stem construction
Standard
Stem material
T2
Stem material
POM
Top housing material
POM
Top housing material
Polycarbonate
Bottom housing material
Nylon
Bottom housing material
Polycarbonate
Mount type
PCB (5-pin)
Mount type
PCB (5-pin)
Spring
22mm single-stage spring
Spring
20mm dual-stage spring
Housing materials
The housing materials of the HMX FJ400 and the Aflion Shadow (Ink) Double Spring switches exhibit a clear distinction in both composition and resulting acoustic properties. The FJ400 features a POM (Polyoxymethylene) top housing, which produces a deeper, more muted sound profile characteristic of its softer texture. This muted quality is reflective of POM's ability to absorb sound frequencies, creating a unique auditory experience that diverges from the more prevalent soundscape of mechanical switches. In contrast, the Shadow (Ink) Double Spring uses a polycarbonate top housing, which imparts a high-pitched and crisp sound. The stiffer nature of polycarbonate facilitates a sharper resonance than POM, resulting in distinct auditory feedback that may appeal to users who prefer a more pronounced sound profile.
The bottom housings of both switches further underscore the differences in their design philosophies. The FJ400 utilizes nylon for its bottom housing, allowing for a fuller and deeper sound when typing due to nylon's sound-absorbent qualities. This creates a rich auditory sensation that resonates with those who appreciate warmth in their switch feedback. Conversely, the Shadow (Ink) Double Spring deploys polycarbonate in both top and bottom housings, contributing to a uniform sound profile that maximizes clarity and brightness across the entire operation of the switch. Such consistency is ideal for users who favor a crisp sound throughout their typing experience, providing an invigorating auditory dimension.
Despite their contrasting materials, both switches can yield satisfying typing experiences depending on user preferences. For instance, while the FJ400’s sound profile may lean towards a deeper, more muted characteristic when bottoming out, the Shadow (Ink) Double Spring excels in providing a clearer sound when releasing keys. Thus, the qualities of the top and bottom housings play crucial roles in shaping the overall experience. Users can choose between the warm, enveloping sound of the FJ400 or the sharper, precise feedback of the Shadow (Ink) based on their individual auditory preferences. For users who appreciate RGB lighting, the transparency of the polycarbonate in the Shadow can enhance visual aesthetics, bringing added appeal to their setup that the FJ400’s darker POM housing simply does not offer.
Weight
When comparing the actuation and bottom out forces of the HMX FJ400 linear switch and the Aflion Shadow (Ink) Double Spring tactile switch, notable differences emerge. The FJ400 has a lighter actuation force of 50 grams compared to the Shadow's 55 grams, making it easier to trigger for prolonged typing or gaming sessions. This makes the FJ400 a preferable choice for users who favor lighter switches for comfort over extended use. However, when it comes to bottom out force, the FJ400 reaches 58 grams while the Shadow’s is slightly higher at 63 grams, indicating that the Shadow offers a more substantial typing experience, which some users may find satisfying despite its heavier actuation force. In summary, if you seek a lighter switch with slightly lower bottom out force, the FJ400 is ideal, whereas the Shadow provides a firmer feel at both actuation and bottom out stages.
Travel distance
When comparing the travel distances of the HMX FJ400 linear switch and the Aflion Shadow (Ink) Double Spring tactile switch, the FJ400 has a travel distance of 3.8 mm, while the Shadow (Ink) Double Spring features a slightly longer travel distance of 4 mm. This makes the FJ400 the shorter option, which may appeal to gamers or users looking for quick responsiveness, as shorter distances typically allow for faster actuation. On the other hand, the Shadow (Ink) switch, with its traditional 4 mm travel, may appeal to those who prefer a more substantial feel and a deeper key press. Thus, your choice between these two switches will depend on whether you prioritize speed or a more pronounced tactile experience.
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 Aflion Shadow (Ink) Double Spring has an MSRP of $4.50 per 10 switches. At Milktooth, we are able to pass on savings to our customers and offer the Shadow (Ink) Double Spring for $3.57.
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 offers a balanced audio profile, making it relatively quiet compared to more tactile switches. This means typists seeking a smooth, unobtrusive typing experience may appreciate the lack of pronounced auditory feedback. In contrast, the Aflion Shadow (Ink) Double Spring switch is characterized by its clacky sound and deep, resonating thocks, which create a sharp, crisp auditory experience. Users can expect a more dynamic and engaging sound that elevates the act of typing, appealing to those who enjoy a more audible performance from their keyboard.
In terms of feel, the FJ400 is designed to deliver a smooth keystroke, providing a consistent experience without any tactile bumps. This makes it favorable for those who prefer unhindered, linear movement when typing or gaming. On the flip side, the Shadow (Ink) Double Spring excels with a highly tactile feel, featuring a sharp and distinct bump that most typists will notice at every keystroke. With its medium-high tactility, users can enjoy tactile feedback without it being overwhelming. The two-staged spring design adds an element of responsiveness and a bouncy sensation, allowing for an engaging typing experience that feels lively and immersive.
Overall, while the HMX FJ400 caters to those who prefer a smooth and quiet typing experience, the Aflion Shadow (Ink) Double Spring provides a more tactile and resonant feedback that’s well suited for enthusiasts seeking auditory and physical engagement. Your choice will largely depend on whether you prioritize sound and feel, as the FJ400 offers a subdued and linear experience, while the Shadow switches enrich the act of typing with prominent feedback and acoustic appeal. Whether you opt for the FJ400’s balanced profile or the vivacious response of the Shadow, each switch has its unique strengths tailored for different user preferences.
Conclusion
In conclusion, your choice between the HMX FJ400 linear switch and the Aflion Shadow (Ink) Double Spring tactile switch should largely depend on your typing style and sound preferences. If you prefer a smooth, consistent keystroke without tactile feedback, and appreciate a balanced sound profile, the FJ400 is an excellent option with its medium actuation force and gentle sound. It's perfect for gamers or typists who desire a quiet and linear experience, allowing for rapid key presses without interruption. On the other hand, if you enjoy typing with a pronounced tactile feedback and a deeper auditory experience, the Aflion Shadow (Ink) Double Spring is the way to go. With its stronger tactile bump and the sharp, clacky sound, this switch will make every keystroke feel more engaging, ideal for those who take joy in the physical sensations of typing. Therefore, consider your personal preferences for sound and feel before making your selection: the smoothness of the FJ400 for a subtle, linear feeling, or the accentuated tactility and pleasant resonation of the Shadow (Ink) for a more dynamic typing experience.
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