HMX FJ400 vs. SP-Star Polaris Purple
An in-depth look at the HMX FJ400 and the SP-Star Polaris Purple switches—which one is the best fit for you?
Overview
When it comes to choosing the right mechanical keyboard switches, the selection between the HMX FJ400 and the SP-Star Polaris Purple offers enthusiasts a compelling contrast in typing experiences. The HMX FJ400, a linear switch, is celebrated for its balanced sound profile, making it an excellent choice for gamers and typists who prefer a smooth, uninterrupted keystroke without the distraction of tactile feedback. On the other hand, the Polaris Purple switch stands out with its pronounced tactile bump, delivering an exhilarating typing experience that many find satisfying and engaging, particularly for those who enjoy the feel of feedback with each press. With the Polaris Purple categorized as ‘Neutral’, ‘Mild’, and ‘Polished’, it caters to users who appreciate a snappy sound profile paired with tactile engagement. Ultimately, your choice will hinge on whether you seek a seamless motion or a defined tactile response. 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
67g
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
Yes
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
Gold plated
Housing materials
When comparing the HMX FJ400 and the SP-Star Polaris Purple switches, one immediately notes the difference in their top housing materials. The FJ400 utilizes a POM (Polyoxymethylene) top housing, known for producing a deeper, more muted sound profile. This characteristic provides a pleasing auditory experience that tends to be less bright and sharp. In contrast, the Polaris Purple features a polycarbonate top housing, which is stiffer and produces a higher-pitched, crisper sound. This distinction in materials suggests that users looking for a softer, more subdued typing experience may prefer the FJ400, while those who enjoy a more vibrant and resonant sound might gravitate toward the Polaris Purple.
Additionally, the bottom housing of both switches further contributes to their overall sound profiles, presenting yet another contrast between the FJ400 and the Polaris Purple. The FJ400 incorporates a nylon bottom housing, celebrated for its ability to absorb sound and create a fuller, deeper auditory experience. This quality leads to a more rounded and mellow typing sound. In contrast, the Polaris Purple employs a polycarbonate bottom housing, akin to its top housing, which again emphasizes sharper and clearer sound characteristics. This combination could lead to a more pronounced typing feedback with the Polaris Purple compared to the FJ400, reinforcing the overall brightness and resonance of the latter.
Ultimately, the differences in housing materials between the HMX FJ400 and the SP-Star Polaris Purple result in distinct auditory experiences, which are notably influenced by the materials employed in both the top and bottom housings. While the FJ400's nylon bottom and POM top create a sound profile that is softer and more muted, the Polaris Purple's dual polycarbonate housings contribute to a sharp and bright acoustic signature. However, despite these differences, both switches can produce a range of experiences when considering typing feel and sound. Users who appreciate contrasting qualities might find both options provide satisfying results, with the ability to enjoy a mix of characteristics if they so choose, depending on their preferences for deeper versus crisper sounds.
Weight
When comparing the HMX FJ400 linear switch and the SP-Star Polaris Purple tactile switch, we find 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, which classifies it as a medium-weight switch. In contrast, the Polaris Purple lacks a specified actuation force but has a bottom out force of 67 grams, placing it in the medium-heavy category. This means that the Polaris Purple requires more force to fully depress, providing a more substantial typing experience that some users may prefer. Consequently, the Polaris Purple is heavier overall compared to the FJ400, which may lead to fatigue during extended use for those who favor lighter switches. However, since the actuation force for the Polaris Purple is unknown, we cannot definitively state how the two compare in that aspect. Users looking for a lighter feel should gravitate toward the FJ400, while those seeking a firmer push may favor the Polaris Purple for its heavier bottom out force.
Travel distance
Comparing the travel distances of the HMX FJ400 linear switch and the SP-Star Polaris Purple tactile switch reveals distinct preferences based on user experience. The FJ400 has a travel distance of 3.8 mm, making it a shorter option, while the Polaris Purple boasts a travel distance of 4.0 mm, which is closer to the traditional standard. For gamers or users seeking quicker response times, the shorter travel distance of the FJ400 may be more appealing for its fast actuation. Conversely, those who appreciate the tactile feedback and depth in their keypresses might prefer the Polaris Purple's longer travel distance. This difference in travel distance means that while both switches can provide satisfying typing experiences, they cater to different user preferences—one for speed and responsiveness and the other for a more substantial feel.
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 SP-Star Polaris Purple has an MSRP of $5.60 per 10 switches. At Milktooth, we are able to pass on savings to our customers and offer the Polaris Purple for $5.00.
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 strikes a middle ground, providing a balanced auditory profile that appeals to a wide range of users. This switch is designed to maintain a noise level that isn’t intrusive, making it suitable for both home and office environments. On the other hand, the SP-Star Polaris Purple tactile switch has a sound profile that is characterized as snappy, which adds a distinct acoustic element to each keystroke. The uniquely defined sound of the Polaris Purple switches is likely to draw attention and provide a more tactile auditory feedback compared to the subtler tones of the FJ400. Ultimately, while both switches cater to different audio preferences, the Polaris Purple's snappy sound might be more engaging for those who appreciate pronounced key presses.
In terms of feel, the HMX FJ400 linear switch offers a smooth and consistent typing experience ideal for users seeking seamless and uninterrupted keystrokes without the distraction of tactile bumps. This linear feel allows for rapid typing without unnecessary resistance. Conversely, the SP-Star Polaris Purple tactile switch is designed to provide a mild tactile bump that gives users a satisfying tactile feedback, enhancing the typing experience. Additionally, the polished nature of the Polaris Purple switches means they deliver a smoothness that reduces friction, making the actuation feel refined. This contrast in feel highlights the choice between the continuous flow offered by the FJ400 and the pronounced feedback of the Polaris Purple, catering to different typing styles.
In conclusion, both the HMX FJ400 linear switch and the SP-Star Polaris Purple tactile switch offer unique sound and feel characteristics that cater to different user preferences. The FJ400 is well-suited for those who prefer a balanced and subdued auditory experience with a smooth typing sensation, while the Polaris Purple appeals to those who enjoy a snappier sound and a pronounced tactile feedback. By understanding these distinctions, newcomers can make informed choices based on their personal typing styles and preferences, whether they prioritize a polished typing experience or a more invigorating tactile response.
Conclusion
To sum up, choosing between the HMX FJ400 linear switch and the SP-Star Polaris Purple tactile switch largely depends on your personal preferences and intended use. If you prefer a smooth, linear typing experience without any tactile feedback, the FJ400 is an excellent choice. Its medium bottom out force of 58 grams ensures a balance between comfort and responsiveness, making it suitable for both gaming and typing without overwhelming your fingers during prolonged use. On the other hand, if you enjoy a more engaging tactile feedback while typing and appreciate a snappy sound profile, the Polaris Purple is the way to go. Its heavier bottom out force of 67 grams, combined with a pronounced tactile bump, offers an exhilarating typing experience that can enhance productivity and satisfaction. Furthermore, the Polaris Purple's polished feel provides a refined and smooth typing journey, making it appealing for those who appreciate that extra touch of luxury. Ultimately, consider how you like to type and what experience you value most in a keyboard switch—the FJ400 for a smooth, consistent action, or the Polaris Purple for a tactile, invigorating journey with each keystroke.
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