HMX FJ400 vs. KTT Lightning
An in-depth look at the HMX FJ400 and the KTT Lightning switches—which one is the best fit for you?
Overview
When choosing a mechanical keyboard switch, the HMX FJ400 and KTT Lightning offer distinct characteristics that cater to different typing preferences and gaming styles. The FJ400 stands out as the middle ground within the HMX Film switch lineup, boasting a balanced sound profile that appeals to users seeking a versatile typing experience. Its smooth actuation provides enough resistance to feel grounded without being overly stiff, making it an excellent choice for long typing sessions. On the other hand, the KTT Lightning switches are designed with speed in mind, ideal for gamers who prioritize reaction time and precision. Their clacky sound profile and sleek typing feel deliver a satisfying auditory feedback that can enhance the gaming experience, especially in high-stakes scenarios where milliseconds matter. While the FJ400 offers a harmonious blend of sound and feel, the KTT Lightning caters to those chasing that competitive edge. However, let's dive in a bit deeper beyond generalities so you can best decide on which switch is right for you.
By the numbers
Technical specifications
Actuation force
50g
Actuation force
43g
Bottom-out force
58g
Bottom-out force
50g
Pre-travel
2.00 mm
Pre-travel
1.00 mm
Total travel
3.80 mm
Total travel
3.00 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
Plate (3-pin)
Spring
22mm single-stage spring
Spring
Stainless steel
Housing materials
When comparing the housing materials of the HMX FJ400 and the KTT Lightning, notable differences arise primarily from the materials used for their top housings. The FJ400 features a POM (polyoxymethylene) top housing, which is known for producing a sound profile on the deeper and more muted side. This results in a unique auditory experience characterized by its fullness and warmth. In contrast, the KTT Lightning utilizes a polycarbonate top housing, which offers a sharper and crisper sound due to the material's rigidity. This distinction creates two distinctly different sound experiences when typing—one more subdued and rounded with the FJ400 and the other brighter and clearer with the Lightning.
Despite the differences in their top housing materials, both switches share the same bottom housing material: nylon. This commonality plays a significant role in the sound and feel produced by each switch. Both the FJ400 and the KTT Lightning benefit from nylon's softer characteristics, which absorb sound more effectively than harder plastics. As a result, both switches exhibit a deeper and fuller sound profile when the key is bottomed out, leading to a grounding consistency in their auditory performance, particularly in the lower frequencies. Thus, while the top housings contribute differently to the overall sound profile, the nylon bottom housings ensure a similar acoustic warmth across both models.
The impact of the housing materials on the overall typing experience is noteworthy. While the FJ400's POM top housing contributes to a muted sound that might appeal to those who prefer a more subtle tactile feedback, the Lightning’s clear polycarbonate housing will attract users looking for enhanced audio clarity and brightness, especially in setups with RGB lighting where translucency plays a vital role. Ultimately, the unique combination of materials in both switches offers distinct yet comparably enjoyable typing experiences. Each switch possesses traits that cater to different user preferences, but the shared nylon bottom housing ties them together in their ability to deliver that rich, full-bodied sound that characterizes traditional mechanical switches.
Weight
When comparing the HMX FJ400 linear switch and the KTT Lightning linear switch, notable differences emerge in both actuation and bottom out forces. The FJ400 features an actuation force of 50 grams and a bottom out force of 58 grams, classifying it as a medium-weight switch, while the Lightning offers a lighter actuation force of 43 grams and a bottom out force of 50 grams. This discrepancy means that users who prefer a lighter touch for extended typing sessions or gaming might favor the KTT Lightning, as its lower forces can reduce finger fatigue. Conversely, users seeking a more substantial feel might gravitate toward the heavier FJ400, as its stronger forces provide a more pronounced tactile experience. Overall, the FJ400 is the heavier option, while the Lightning is lighter, catering to different preferences in typing dynamics.
Travel distance
When comparing the travel distances of the HMX FJ400 linear switch and the KTT Lightning linear switch, there is a distinct difference: the FJ400 features a travel distance of 3.8 mm, while the Lightning has a shorter travel distance of 3 mm. This means that the FJ400 provides a deeper keystroke that some users may find more satisfying, offering a more traditional feel that can be preferable for typing. In contrast, the Lightning's shallower travel distance is geared more towards gamers, allowing for quicker actuation and response times. Therefore, those who prioritize speed and responsiveness in their gaming experience may lean towards the KTT Lightning switch, while those who appreciate a more pronounced depth might favor the HMX FJ400 for its longer travel distance.
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 KTT Lightning comes in at $3.41 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
In terms of sound, the HMX FJ400 switch features a balanced sound profile, making it versatile for various typing environments. This allows it to blend well in both quiet and more active spaces without overwhelming the user or those around them. In contrast, the KTT Lightning switch is characterized by its clacky sound profile, producing a sharp and snappy noise that is not only high-pitched but also has a unique chirpy quality. This zestful acoustic signature can particularly appeal to users who enjoy an energetic typing experience, though it may be less suitable for quieter workspaces due to its pronounced auditory presence.
When considering the feel of the switches, the FJ400's tactile characteristics remain somewhat unspecified, leaving room for interpretation based on personal experience. On the other hand, the Lightning switch offers a notably smooth and refined typing experience, with its polished finish contributing to reduced friction and seamless key travel. The subtle resistance of the Lightning switch allows typists to enjoy a light and comfortable touch, making it ideal for scenarios where speed is crucial while maintaining a non-resonant sound signature, suitable for shared environments.
Overall, while both the HMX FJ400 and KTT Lightning switches cater to specific user preferences, they offer distinct experiences in sound and feel. The FJ400’s balanced sound and potentially versatile typing experience may make it perfect for a wider range of use cases, while the Lightning's clackiness and polished tactile feel lend themselves well to rapid and spirited typing. Ultimately, selecting between the two will come down to personal preference regarding sound preference and tactile engagement.
Conclusion
To conclude, the choice between the HMX FJ400 linear switch and the KTT Lightning linear switch ultimately depends on your specific typing and gaming preferences. If you're looking for a balanced middle ground in terms of resistance and sound, the FJ400’s 58-gram actuation force will provide you with a solid feel without being too heavy or too light, making it well-suited for lengthy typing sessions or a variety of tasks. Its balanced sound profile makes it a great option for office scenarios or shared spaces where you don't want to disturb others. On the other hand, if you prioritize speed and response time in your gaming endeavors, the KTT Lightning switch, with its lighter 50-gram actuation force, is designed to help you achieve quick key presses and swift reactions. The unique clacky sound profile adds character to your typing experience and can be quite satisfying for those who enjoy auditory feedback. Additionally, its subtle and polished feel ensures smooth key travel, making it a pleasure to use. Ultimately, choosing between these two switches hinges on whether you value a more balanced typing experience or a lightweight, fast-acting switch that enhances your gaming performance.
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