SP-Star RedBlue vs. HMX SU
An in-depth look at the SP-Star RedBlue and the HMX SU switches—which one is the best fit for you?
Overview
When it comes to choosing mechanical keyboard switches, enthusiasts often find themselves weighing the benefits of different options to match their typing style and preferences. The SP-Star RedBlue switches are renowned for their medium-light actuation, making them an excellent choice for users who enjoy a smooth and effortless typing experience. With a low-pitched sound profile that is both neutral and mild, these switches deliver a polished feel, ideal for those seeking a quieter yet satisfying keystroke. In contrast, the HMX SU switches bring a different charm to the table. With a full PA12 housing and a T5 stem, they provide a subtly deeper sound profile that appeals to users who enjoy a bit more thock in their typing. While both switches are linear and cater to different tastes, the choice ultimately boils down to personal preference in sound and feel. 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
N/A
Actuation force
45g
Bottom-out force
57g
Bottom-out force
50g
Pre-travel
2.00 mm
Pre-travel
1.80 mm
Total travel
4.00 mm
Total travel
3.60 mm
Factory lubed
Yes
Factory lubed
Yes
Stem construction
Standard
Stem construction
Standard
Stem material
POM
Stem material
T5
Top housing material
Polycarbonate
Top housing material
Nylon
Bottom housing material
Polycarbonate
Bottom housing material
Nylon
Mount type
PCB (5-pin)
Mount type
PCB (5-pin)
Spring
Gold plated
Spring
22mm single-stage spring
Housing materials
When comparing the housing materials of the SP-Star RedBlue and the HMX SU, clear distinctions arise in the choice of plastics used. The RedBlue employs polycarbonate for both its top and bottom housings, which inherently influences its sound profile towards a sharper, higher-pitched, and crisper quality. This is due to polycarbonate’s stiffer nature, enabling a more resonant sound that benefits notably from the translucency of the material, enhancing RGB lighting effects. In contrast, the HMX SU utilizes nylon for both its top and bottom housings, which leads to a substantially different auditory experience. Nylon, being a softer plastic, absorbs sound more effectively and produces a deeper, fuller sound profile. Thus, while the RedBlue delivers a brighter, more articulated sound, the SU yields a warmer and more rounded auditory character.
The differences between the two switches do not only lie in the composition of their housing materials but also in how these materials affect typing experience. With the RedBlue's polycarbonate housing, users can expect a clear and responsive feedback during typing due to the material's rigidity. In contrast, the HMX SU's nylon housing may offer a more muted response, cushioning the sound and creating a heavier, dampened feel. This divergence means that the tactile experience is distinctly different; where the RedBlue might feel more lively and resonant, the SU caters to those who prefer a softer and less intrusive typing experience, further emphasizing personal preferences for sound and feel in mechanical switches.
If one were to analyze the overall sound and typing qualities derived from different materials within the two switches, similarities could emerge depending on the context of use. For instance, if both switches were tested under conditions where auditory clarity and tactile feedback were essential, users might observe how the contrasting characteristics of each housing influence the final experience. Despite the fundamental differences—polycarbonate offering brightness and clarity, and nylon providing warmth and depth—both switch types could conceivably yield satisfying results tailored to the specific desire for sound quality and tactile feedback in keyboard enthusiasts. Whether through the clear brilliance of the RedBlue or the soft resonance of the SU, each switch holds unique virtues that may cater to different user preferences while achieving effective performance.
Weight
When comparing the actuation force and bottom out force of the SP-Star RedBlue linear switch and the HMX SU linear switch, significant differences emerge in their specifications. The SP-Star RedBlue has an unknown actuation force, making it difficult to assess its responsiveness compared to the HMX SU’s actuation force of 45 grams, which is classified as light. The bottom out force of the RedBlue is 57 grams, indicating a medium-light feeling when fully pressed down, while the SU’s bottom out force is 50 grams, which also contributes to its overall light feel. In this comparison, the HMX SU is the lighter switch due to its lower actuation force, making it suitable for users who prefer less resistance for extended typing or gaming sessions. Conversely, for those who enjoy a more substantial typing experience with a stronger push feel, the SP-Star RedBlue may provide that sensation despite its unknown actuation force. Overall, the two switches cater to different preferences in terms of weight and tactile feedback.
Travel distance
When comparing the travel distances of the SP-Star RedBlue linear switch and the HMX SU linear switch, the SP-Star RedBlue stands out with a travel distance of 4 mm, while the HMX SU has a shorter travel distance of 3.6 mm. This difference reflects a notable preference between the two switches: the RedBlue offers a more traditional feel with its longer travel distance, catering to those who appreciate a deeper keypress and a tactile experience. On the other hand, the HMX SU, with its 3.6 mm travel, aligns with modern trends favoring shorter distances, which can provide faster response times—a significant advantage for gamers seeking quick execution. Ultimately, the choice between the two will depend on individual preferences, with the RedBlue being ideal for those who enjoy a more substantial keypress and the SU appealing to users who prioritize responsiveness in their typing or gaming experience.
Price comparison
Which switch is more bang for your buck?
The SP-Star RedBlue has an MSRP of $5.80 per 10 switches. At Milktooth, we are able to pass on savings to our customers and offer the RedBlue for $5.40.
The HMX SU has an MSRP of $3.50 per 10 switches. At Milktooth, we are able to pass on savings to our customers and offer the SU for $3.29.
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 comparing the sound profiles of the SP-Star RedBlue and the HMX SU linear switches, both have unique qualities. The RedBlue switches are noted for their low-pitched sound, producing a mellow and bass-heavy tone that is often described as thocky. This deep and rich quality provides a satisfying auditory experience, making them ideal for both work and leisure activity without being overly intrusive. On the other hand, the sound profile of the SU switches has not been specifically detailed, leaving their acoustic characteristics unknown. Since the sound of a switch is also influenced by the keyboard construction and choice of keycaps, the overall acoustics for both switches can vary depending on the setup used.
Moving on to the feel of the switches, the RedBlue linear switches are characterized by a mild typing experience. They offer a gentle touch that is approachable for both seasoned typists and newcomers alike, allowing for a smooth and polished key press. This smoothness is often attributed to the refined manufacturing process and material choices, leading to reduced friction during key travel. Conversely, the feel of the HMX SU switches has not been discussed, which means their tactile sensation and overall typing experience remain a mystery at this point.
In summary, while the SP-Star RedBlue linear switches provide a well-rounded, low-pitched sound and a mild, polished feel, the characteristics of the HMX SU linear switches in terms of sound and feel are not available. Therefore, those opting for the RedBlue will find a satisfying typing experience with gentle acoustics, while the experience with the SU switches remains uncertain. Regardless, those seeking similarities in typing experience can anticipate certain common qualities inherent to linear switches, such as smooth key travel and a straightforward design, which these switches typically share.
Conclusion
To conclude, the choice between the SP-Star RedBlue linear switch and the HMX SU linear switch ultimately hinges on your personal preferences in typing feel and sound profile. If you gravitate towards a medium-light typing experience and appreciate a low-pitched sound with a thocky tone, the RedBlue is an excellent option. Its polished feel and mild characteristics cater to both beginners and seasoned typists, making it a versatile choice whether you're using it for work or gaming. On the other hand, if you prefer a lighter touch with a bottom-out force of just 50 grams, the HMX SU may be more suited to your needs. Although it does not have the rich sound profile of the RedBlue, its subtle and relatively deep sound can provide a satisfying experience for those who enjoy a more understated auditory feedback. In the end, consider the type of feedback you desire from your keyboard, and let that guide your choice between these two distinct yet appealing switches.
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