HMX FJ400 vs. Durock Mamba
An in-depth look at the HMX FJ400 and the Durock Mamba switches—which one is the best fit for you?
Overview
When considering mechanical keyboard switches, the HMX FJ400 and the Durock Mamba both present unique advantages, especially for fans of linear switches. The FJ400 stands out as a balanced choice within the HMX Film switch lineup, delivering a well-rounded sound profile that can enhance both typing and gaming experiences without overwhelming auditory distractions. On the other hand, the Durock Mamba pays homage to the legendary Kobe Bryant, providing users with a smooth, gliding typing sensation accompanied by a rich and creamy auditory experience that adds a touch of luxury to every keystroke. While the FJ400 may appeal to those seeking a versatile and unobtrusive switch, the Mamba captivates with its polished and thocky feel, perfect for users desiring a superior tactile experience. However, let's dive in a bit deeper beyond generalities so you can best decide on the right switch for you.
By the numbers
Technical specifications
Actuation force
50g
Actuation force
N/A
Bottom-out force
58g
Bottom-out force
60g
Pre-travel
2.00 mm
Pre-travel
2.00 mm
Total travel
3.80 mm
Total travel
3.50 mm
Factory lubed
Yes
Factory lubed
Yes
Stem construction
Standard
Stem construction
Standard
Stem material
T2
Stem material
Ly
Top housing material
POM
Top housing material
Polymer nylon and UHMWPE blend
Bottom housing material
Nylon
Bottom housing material
POM
Mount type
PCB (5-pin)
Mount type
PCB (5-pin)
Spring
22mm single-stage spring
Spring
Extended long spring
Housing materials
The housing materials used in the HMX FJ400 and the Durock Mamba switches present a fascinating study in contrasts that ultimately contribute to their unique sound profiles. The FJ400 features POM (Polyoxymethylene) for its top housing, a material celebrated for creating a deeper and more muted sound. This POM top promotes a sound that is rich and pleasantly enveloping, which enhances the typing experience by way of its substantial aural character. In contrast, the Durock Mamba employs a blend of polymer nylon and UHMWPE (Ultra High Molecular Weight Polyethylene) for its top housing. This combination yields a sound that is notably brighter, yet it maintains a pleasant auditory experience. The brighter profile of the Mamba can be attributed to the nylon’s characteristics, which, while softer than POM, provides a tonal quality that is distinct and crisp.
On the bottom housing front, the FJ400 leverages nylon again, a classic switch housing material known for its ability to produce a deeper and fuller sound profile. The soft nature of nylon plays a critical role in absorbing sound, which results in a softer bottom-out feel and a more rounded auditory experience. Conversely, the Durock Mamba utilizes POM for its bottom housing, mirroring the qualities it brings from the top housing in the FJ400. This choice introduces a consistency in the sound profile, as the POM contributes to a deeper and more muted sound as well. As such, the difference in the bottom housing materials between the two switches results in a striking contrast, where the nylon of the FJ400 emphasizes warmth and fullness while the POM in the Mamba solidifies a deeper sound texture.
When considering the overall typing experience of the HMX FJ400 and Durock Mamba, it becomes evident that even though the materials differ in both the top and bottom housings, the inherent qualities of each housing material combine to deliver distinct yet complementary results. Each switch’s bottom housing plays a crucial role in defining the bottom-out sound and feel, while the top housing influences the release. Thus, while the FJ400 encapsulates a more muted and deeper sound profile due to its unique use of POM combined with nylon, the Durock Mamba leverages the contrasting brightness of its materials to evoke a crisp and pleasant auditory response. Ultimately, these divergent characteristics allow for a rich variety in the overall typing experience, appealing to users who may prefer either a warmer deep sound or a bright, sharper auditory finish.
Weight
When comparing the HMX FJ400 linear switch and the Durock Mamba linear switch, both switches offer a medium tactile experience, but they differ in specific actuation and bottom out forces. The FJ400 has a defined actuation force of 50 grams, paired with a bottom out force of 58 grams, providing a balanced typing feel suited for users who appreciate a moderate push without excess strain. In contrast, the Mamba's actuation force is not specified, which means it is difficult to ascertain how it performs in terms of keystroke activation; however, it does have a slightly heavier bottom out force of 60 grams. As a result, while the FJ400 is the lighter option with its lower actuation force and overall weight during usage, the Mamba may offer a firmer typing experience at bottoming out. Users who favor a lighter switch may find the FJ400 more comfortable for prolonged use, whereas those who prefer a stronger push feel might lean towards the Mamba.
Travel distance
When comparing the travel distance of the HMX FJ400 linear switch and the Durock Mamba linear switch, it becomes clear that the FJ400 features a longer travel distance of 3.8 mm, while the Mamba has a slightly shorter travel distance of 3.5 mm. This difference may influence user experience significantly; for gamers and fast typists, the Mamba's shorter travel could offer a more responsive feel, facilitating quicker key presses. Conversely, those who prefer a deeper keystroke may lean towards the FJ400, appreciating its greater travel distance for a more substantial typing experience. Thus, while both switches cater to different preferences, the FJ400 stands out for those seeking a more pronounced depth, whereas the Mamba attracts those who prioritize speed and quick response times.
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 Mamba has an MSRP of $6.50 per 10 switches. At Milktooth, we are able to pass on savings to our customers and offer the Mamba for $5.17.
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 strikes a balanced tone, making it versatile for various environments and preferences. In comparison, the Durock Mamba switch boasts a rich auditory experience that leans towards a thocky signature, making the sound deep and satisfying on actuation. This rich sound, combined with its neutral characteristics, positions the Mamba as not only enjoyable to type on but also adaptable for both casual and professional settings. While both switches can vary in sound depending on the keyboard and keycap choices, the FJ400 provides a more neutral audio output while the Mamba leans towards deep and resonant tones.
When it comes to the feel of the switches, the FJ400 is viewed as a stable, pleasant option for those who enjoy linear switches, making it a solid choice on its own. The Mamba, however, elevates the typing experience with its mild characteristics, which provide a gentle and approachable touch, alongside a polished finish that lends to its smooth and refined travel. This polished feel enhances the overall typing experience by allowing for a seamless glide when pressing each key, making it particularly suited for users who prioritize smoothness and comfort in their typing experience.
In summary, while both the HMX FJ400 and the Durock Mamba linear switches share the linear characteristic and create a satisfying typing experience, they cater to slightly different preferences. The FJ400 is suitable for those seeking balance in sound and feel, while the Mamba offers a deeper auditory delight and an exceptionally smooth typing sensation. Your choice between these two will ultimately depend on whether you prefer a more neutral sound and feel or are drawn to a rich audio profile and a highly polished typing experience.
Conclusion
To wrap up, your choice between the HMX FJ400 linear switch and the Durock Mamba linear switch largely hinges on your specific typing preferences and the environments in which you plan to use them. If you appreciate a balanced sound profile and a medium bottom-out force that feels adaptable for both gaming and productivity, the FJ400 is a solid choice. Its versatility makes it suitable for various setups, whether you're creating content, coding, or just enjoying some casual gaming. On the other hand, if you're drawn to a richer auditory experience and a gliding typing sensation reminiscent of a well-polished keyboard, the Durock Mamba is likely to elevate your typing experience. Its slightly higher bottom-out force and thocky sound profile can provide a satisfying feedback loop that enhances your engagement while typing or gaming. Ultimately, consider what aspects matter most to you: if smoothness and neutrality are your priorities, go for the FJ400; if you desire a more luxurious, thocky sound and feel, then the Mamba will serve you well.
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