HMX FJ400 vs. Gateron Mountain Top
An in-depth look at the HMX FJ400 and the Gateron Mountain Top switches—which one is the best fit for you?
Overview
When searching for the ideal mechanical keyboard switch, both the HMX FJ400 and Gateron Mountain Top present compelling options for enthusiasts who prefer linear switches. The FJ400 strikes a harmonious balance within the HMX Film lineup, offering a well-rounded sound profile that caters to users looking for an engaging yet not overly noisy typing experience. This middle-ground switch provides a subtle tactile response that appeals to gamers and typists alike who appreciate smooth keystrokes without distractions. On the other hand, the Gateron Mountain Top switches are specifically designed for office environments, focusing on discretion. These switches deliver a quiet typing experience paired with a pleasantly light actuation, making them an ideal choice for those who work in shared spaces or need to maintain a focused atmosphere. While both switches offer linear characteristics that promote uninterrupted typing, they cater to slightly different user needs and environments. However, let's dive in a bit deeper beyond generalities so you can best decide on the switch that suits you best.
By the numbers
Technical specifications
Actuation force
50g
Actuation force
40g
Bottom-out force
58g
Bottom-out force
50g
Pre-travel
2.00 mm
Pre-travel
1.40 mm
Total travel
3.80 mm
Total travel
3.40 mm
Factory lubed
Yes
Factory lubed
Yes
Stem construction
Standard
Stem construction
Standard
Stem material
T2
Stem material
POM
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 double-stage spring
Housing materials
The HMX FJ400 and Gateron Mountain Top switches utilize distinctly different materials for their top housings, yet both achieve similarly rewarding auditory experiences for typists. The FJ400 features a POM (polyoxymethylene) top housing that is known for creating a unique sound profile characterized by deeper, more muted tones. This contrasts with the Gateron Mountain Top, which employs a nylon top housing, delivering a fuller and deeper sound as a result of its softer composition. Despite their different materials, both switches allow for a satisfying typing experience, showcasing how variations in housing can still produce comparably pleasing auditory responses in use.
When examining the bottom housings of both switches, the comparison reveals a uniformity in material choice that contributes to their acoustic profile. Both the FJ400 and Mountain Top switches utilize nylon for their bottom housings, which is celebrated for its sound absorption qualities. The nylon composition in both switches allows for a deeper, fuller sound, as the material's softness helps to dampen vibrations associated with keystrokes. In this way, both switches leverage nylon’s abilities to create a rounded sound experience, indicating that although their top housings differ, they still have a shared foundation that guides their overall performance.
Additionally, the construction of each switch contributes to the tactile feedback experienced during typing. The FJ400's POM top housing lends a distinct quality to the release sound when letting go of the keys, whereas the nylon bottom housing is responsible for shaping the bottom-out sound and feel. Conversely, the Mountain Top also benefits from the absorbing properties of its nylon materials for both top and bottom sides, resulting in an overall smoother typing experience. Together, these factors highlight how the different compositions can work in tandem to influence sound and feel differently while still achieving similar auditory results due to shared materials in the bottom housings.
Weight
When comparing the HMX FJ400 linear switch and the Gateron Mountain Top linear switch, there are notable differences in their actuation and bottom out forces. The FJ400 features an actuation force of 50 grams and a bottom out force of 58 grams, resulting in a medium resistance that may appeal to users who enjoy a substantial feel while typing. In contrast, the Mountain Top has a lighter actuation force of 40 grams and a bottom out force of 50 grams, making it more suitable for those who prefer a lighter touch during longer typing sessions or extended gaming marathons. As a result, the FJ400 feels heavier compared to the Mountain Top, catering to users who appreciate a firmer typing experience, while the Mountain Top is the better option for those who favor ease and reduced strain during prolonged use. Ultimately, the choice between these switches will depend on an individual's preference for actuation force and the overall typing experience they seek.
Travel distance
When comparing the travel distances of the HMX FJ400 linear switch and the Gateron Mountain Top linear switch, we observe a distinct difference: the FJ400 has a travel distance of 3.8 mm, whereas the Mountain Top measures a shorter 3.4 mm. This 0.4 mm difference highlights the FJ400 as the preferred choice for users who appreciate a more substantial keystroke, offering a deeper and potentially more satisfying experience. On the other hand, the Mountain Top, with its shorter travel distance, appeals to those seeking faster response times typical in gaming scenarios. Ultimately, your choice should reflect your personal preference for either responsiveness or a more pronounced key feel, solidifying the HMX FJ400 as the longer travel option and the Gateron Mountain Top as the shorter one.
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 Gateron Mountain Top comes in at $6.00 per 10 switches.
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
The sound profile of the HMX FJ400 linear switch is described as balanced, making it a versatile option for various environments without being intrusive. On the other hand, the Gateron Mountain Top switches are designed specifically for quiet operation, providing a neutral sound that is moderate yet unobtrusive. This makes the Mountain Top suitable for office settings where a restrained auditory presence is desired, while the FJ400’s balanced sound allows it to excel in both home and public spaces, catering well to a variety of preferences.
When it comes to feel, the HMX FJ400 switch does not have specific descriptors available in this context, but the Mountain Top switch offers a distinctly bouncy sensation, giving users a spring-like feedback that enhances the typing experience. The Mountain Top is also characterized as easy to press, requiring minimal force for actuation and reducing finger fatigue over extended use. This aligns with its mild and subtle qualities, making it approachable for a broad audience. The additional snappy aspect contributes to a lively and responsive feel, ensuring that typists experience something more dynamic but still comfortable.
Overall, both the FJ400 and Mountain Top linear switches present unique benefits tailored to different user needs. The FJ400’s balanced sound makes it versatile for various settings, while the Mountain Top excels in quieter environments, offering a range of tactile feedback that is ideal for prolonged typing sessions. While the FJ400 lacks specific descriptors for feel, the Mountain Top's features highlight a responsive and gentle experience. Those looking for a quiet typing experience may find the Gateron Mountain Top to be more suitable, whereas users seeking a well-rounded profile might prefer the HMX FJ400 for its flexibility. Each switch essentially serves different purposes, allowing users to choose based on their specific typing environment and preferences.
Conclusion
To conclude, the choice between the HMX FJ400 linear switch and the Gateron Mountain Top linear switch ultimately depends on your specific typing preferences and the environment in which you will be using your keyboard. If you're looking for a switch that provides a balanced sound profile and medium actuation force of 58 grams, then the FJ400 may be your best bet. It's suitable for those who want a more pronounced feedback while typing, providing a satisfying yet not overwhelming experience. On the other hand, if you prioritize a quiet typing experience ideal for office environments, the Mountain Top's lighter bottom-out force of 50 grams may be more appealing. Its bouncy feel and gentle resistance make it particularly well-suited for lengthy typing sessions without causing finger fatigue—perfect for maintaining focus in a quieter workspace. In essence, if you desire a balanced switch that caters to a variety of settings, the FJ400 is your go-to. Conversely, choose the Mountain Top if your priority is to type quietly while still enjoying a lively and responsive feel. Both switches are excellent choices, and your decision should reflect your specific typing habits and environment.
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