HMX FJ400 vs. HMX Jelly
An in-depth look at the HMX FJ400 and the HMX Jelly switches—which one is the best fit for you?
Overview
When it comes to choosing the right mechanical keyboard switch, the HMX FJ400 and the HMX Jelly both provide unique benefits while falling under the category of linear switches. The FJ400 is celebrated for its balanced sound profile, serving as a versatile option for gamers and typists alike who value a blend of sound and performance. In contrast, the HMX Jelly is distinguished by its low-pitched, deep, thocky sound signature, a quality that many users find satisfying for both typing and gaming and is complemented by its lightweight 42g actuation force and smooth performance due to excellent factory lubrication. While both switches offer distinct characteristics, your choice may depend on whether you prefer the FJ400's balanced acoustics or the Jelly's unique auditory experience. However, let's dive in a bit deeper beyond generalities so you can best decide on the best switch for you.
By the numbers
Technical specifications
Actuation force
50g
Actuation force
42g
Bottom-out force
58g
Bottom-out force
48g
Pre-travel
2.00 mm
Pre-travel
2.00 mm
Total travel
3.80 mm
Total travel
3.80 mm
Factory lubed
Yes
Factory lubed
Yes
Stem construction
Standard
Stem construction
Standard
Stem material
T2
Stem material
T2
Top housing material
POM
Top housing material
Nylon
Bottom housing material
Nylon
Bottom housing material
Nylon
Mount type
PCB (5-pin)
Mount type
PCB (5-pin)
Spring
22mm single-stage spring
Spring
22mm extended single-stage spring
Housing materials
When comparing the housing materials of the HMX FJ400 and the HMX Jelly, the differences in their top housings are noteworthy. The FJ400 features a POM (Polyoxymethylene) top housing, known for producing a unique sound profile that is deeper and more muted compared to other materials. This aligns with the characteristics of POM, which is a harder plastic. In contrast, the Jelly utilizes a nylon top housing, a classic material that is softer and contributes to a fuller sound profile. As nylon absorbs more sound due to its inherent softness, it creates a more rounded and duller auditory experience. As a result, while the FJ400's POM top adds clarity and distinctiveness to key releases, the Jelly’s nylon alternative is likely to yield a warmer sounding finish.
On the flip side, both the FJ400 and the Jelly utilize nylon as their bottom housing material. This similarity means they share acoustic characteristics that make for a deeper and fuller sound profile when the keys bottom out. The nylon utilized in both switch designs absorbs sound more effectively than harder materials, thereby enhancing the overall typing experience with muted thuds and a more pleasant auditory feedback. The emphasis on a similar bottom housing indicates that, when pressed down, both switches will deliver a satisfying and consistent tactile feedback, enriching the soundscape regardless of the differences in their top housings.
In summary, while the FJ400 and the Jelly differ in their top housing materials, they converge in their bottom housing choice alluding to how the combined materials affect sound. The POM top of the FJ400 may lend a distinct clarity to the release sound, while the nylon top of the Jelly promotes warmth. However, since both switches share a nylon bottom, typists can still expect a comparable sound experience when bottoming out, characterized by soft, rounded acoustics. This blend of materials suggests that regardless of the unique auditory qualities introduced by their respective top housings, both switches are capable of delivering a satisfying overall sound profile that appeals to users seeking a comforting typing experience.
Weight
The HMX FJ400 and HMX Jelly linear switches present a clear contrast in terms of actuation and bottom out forces, catering to different user preferences. The FJ400 features an actuation force of 50 grams and a bottom out force of 58 grams, categorizing it as a medium-weight switch. In comparison, the Jelly switch operates with a lighter actuation force of 42 grams and a bottom out force of 48 grams, making it a more suitable choice for those who prioritize extended typing sessions without fatigue. The difference in actuation force indicates that users of the Jelly switch will experience a softer feel when pressing down, while FJ400 users will encounter a more substantial resistance. Overall, if a user seeks a lighter typing experience that allows for longer periods of use, the Jelly switch would be the preferable option; conversely, those who prefer a stronger tactile response may gravitate towards the heavier FJ400 switch.
Travel distance
The HMX FJ400 linear switch and the HMX Jelly linear switch both share the same travel distance of 3.8 mm, meaning that users can expect a similar typing experience in terms of key press depth. This equality ensures that both switches will provide comparable feedback and responsiveness when pressed, making it easier to transition between the two without needing to adjust to a different feel or depth during typing or gaming sessions. Therefore, in terms of travel distance, neither switch is shorter or longer; they deliver identical performance.
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 HMX Jelly has an MSRP of $3.50 per 10 switches. At Milktooth, we are able to pass on savings to our customers and offer the Jelly for $2.99.
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
In terms of sound, the HMX FJ400 linear switch is known for its balanced sound profile, providing a harmonious auditory experience that doesn't lean too heavily on either end of the spectrum. This makes it a versatile choice that can suit many users, particularly those looking for a more subdued typing experience. On the other hand, the HMX Jelly linear switch features a low-pitched, deep, thocky sound signature that adds a satisfying auditory feedback, especially appealing to those who enjoy a more pronounced acoustics while typing. While the FJ400 offers a more neutral tone, the Jelly's deeper thock can create a more engaging atmosphere, especially when paired with the right keyboard and keycaps.
When it comes to feel, the FJ400 offers a smooth typing experience but lacks specific descriptors that would distinguish it from other linear switches. In contrast, the Jelly switch stands out due to its super smooth action, attributed to its excellent factory lubrication, and its lightweight actuation force of 42g. This combination makes the Jelly incredibly responsive and easy to type on, appealing to users who prioritize speed and efficiency during their typing or gaming sessions. The FJ400 may provide a satisfactory experience, but the Jelly is designed to enhance the tactile sensation with a more noticeable ease of operation.
Overall, both the HMX FJ400 and HMX Jelly linear switches offer unique qualities that cater to different preferences. The FJ400's balanced sound and adaptable feel make it a solid everyday option, while the Jelly showcases an engaging deep sound profile and a notably smooth response that is perfect for fast typists or gamers alike. Users can expect a satisfying typing experience with either switch, although the Jelly may appeal more to those looking for distinct auditory and tactile feedback. For similar results in terms of sound experience, pairing either switch with compatible boards and keycaps will allow users to tailor their keyboard's performance to their personal preferences.
Conclusion
To sum up, choosing between the HMX FJ400 linear switch and the HMX Jelly linear switch ultimately depends on your personal preferences and usage scenarios. If you prefer a medium bottom-out force of 58 grams that provides a balanced tactile experience, the FJ400 is your go-to option. This switch strikes a harmonious balance between a firm feel and a satisfying sound profile, making it ideal for typing or gaming where you want good feedback without overwhelming resistance. On the other hand, if you're drawn to a lighter touch, the Jelly switch, with its 48 grams bottom-out force and deep thocky sound signature, may be more appealing. The Jelly excels in delivering a super smooth experience, thanks to its excellent factory lube, making it perfect for rapid typing or extended gaming sessions where comfort and fluidity take precedence over tactile feedback. Ultimately, your choice will hinge on whether you value a balanced yet slightly firmer feel or a lighter, silky-smooth experience with a unique auditory character.
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