HMX Blue Topaz vs. HMX SU

Overview

When exploring the world of mechanical keyboard switches, two standout options worth considering are the HMX Blue Topaz and the HMX SU, both of which belong to the category of linear switches. The HMX Blue Topaz is celebrated for its lightweight feel and super smooth actuation, which allows for effortless keystrokes—making it a great choice for those who prioritize a fluid typing experience. Additionally, it boasts a visually appealing housing with a sparkling glitter finish and a distinct clacky sound signature that provides an auditory enjoyment alongside tactile feedback. In contrast, the HMX SU switches are designed with a full PA12 housing, paired with a T5 stem, resulting in a relatively deep and subtle sound profile, perfect for users who seek a more subdued acoustic experience. While the Blue Topaz is ideal for those who want a lively and engaging typing environment, the SU caters to those who prefer a more understated approach. However, let's dive in a bit deeper beyond generalities so you can best decide on the best switch for you.

By the numbers

HMX Blue Topaz Linear

HMX SU Linear

$4.00

$3.49 per 10

$3.50

$3.29 per 10

Learn moreLearn more

Housing materials

When comparing the housing materials of the HMX Blue Topaz and the HMX SU, it's evident that the two switches exhibit different choices for their top housings, which significantly influence their overall sound profile. The Blue Topaz features a polycarbonate top housing, which is known for its stiffer characteristics. This rigidity contributes to a sharper, higher-pitched, and crisper sound profile due to its resonance qualities. In contrast, the HMX SU employs a nylon top housing that produces a deeper and fuller sound because nylon is a softer plastic that tends to absorb sound better, resulting in a rounder auditory experience. Consequently, while both switches may offer satisfying tactile feedback, the auditory experience diverges due to the different top housing materials used.

Both switches, however, utilize nylon for their bottom housing, creating a shared element that affects their performance. As nylon is a classic material for switch bottoms, it enhances the sound profile by absorbing sound waves and generating a more muted, yet rich, noise when the key bottoms out. Since the bottom housing has a significant impact on the feel and sound associated with key presses, both switches deliver a similar deeper tone thanks to this shared nylon material. This similarity may offer users a familiar tactile experience when bottoming out the key, regardless of the distinct auditory characteristics resulting from the differing top housing materials.

Ultimately, the combination of these housing materials in both the Blue Topaz and SU switches illustrates a balance between sound projection and absorption. While the different top housings lend unique auditory experiences—sharp and crisp from the polycarbonate or deep and full from the nylon—the bottom housings ensure a comparable felt impact when a key press is completed. As a result, users can expect a rich typing experience with a resonant bottom-out sound in all cases, but the nuances in audio feedback during key release will distinguish the two switches. Thus, both models can provide an appealing experience tailored to different auditory preferences while sharing a cohesive core feel due to their nylon bottoms.

Weight

The HMX Blue Topaz linear switch and the HMX SU linear switch exhibit slight differences in their actuation and bottom out forces, making them suitable for different user preferences. The Blue Topaz boasts an actuation force of 40 grams and a bottom out force of 48 grams, while the SU features a slightly higher actuation force of 45 grams and a bottom out force of 50 grams. Both switches can be considered light, but the Blue Topaz is lighter in both categories. This distinction allows typists and gamers who favor a lighter touch and extended typing sessions to prefer the Blue Topaz, whereas those who desire a more substantial feel may lean towards the heavier SU switch. Overall, while both switches provide a comfortable typing experience, the subtle differences in their force measurements cater to varying user preferences for typing dynamics.

Travel distance

When comparing the travel distances of the HMX Blue Topaz linear switch and the HMX SU linear switch, we see a notable difference in their measurements. The Blue Topaz features a travel distance of 3.9 mm, while the SU has a slightly shorter travel distance of 3.6 mm. This indicates that the Blue Topaz provides a more pronounced key press experience, making it potentially more appealing for users who prefer a deeper, more tactile feel when typing or gaming. On the other hand, the shorter 3.6 mm travel distance of the SU switch could benefit users seeking quicker response times, typical of gaming preferences, as less distance to travel can lead to faster actuation. Ultimately, the choice between these two switches will depend on individual preferences, with a preference for a more hearty depth leaning towards the Blue Topaz, while those favoring responsiveness may opt for the SU.

Price comparison

Typing experience

When it comes to sound, the HMX Blue Topaz linear switch is characterized by its clacky sound profile, which produces a sharp and snappy noise upon actuation. This crisp, bright, and percussive auditory experience appeals to users who enjoy a more pronounced feedback with their keystrokes. On the other hand, the sound profile of the HMX SU is relatively deep but subtle, indicating a quieter typing experience that likely leans toward a more subdued auditory feedback. While both switches have their unique sound signatures, it's essential to note that the overall sound can also be influenced by the keyboard's construction and choice of keycaps.

In terms of feel, the Blue Topaz switch boasts an easy-to-press nature, requiring minimal force to activate, which contributes to a lightweight and effortless typing experience. This gentle resistance makes it particularly comfortable for prolonged use, reducing the likelihood of finger fatigue. In contrast, the feel of the HMX SU switches is currently unknown, leaving room for exploration regarding their actuation weight and overall typing comfort.

In summary, while the HMX Blue Topaz linear switch stands out with its smooth, lightweight feel and clacky auditory feedback, the HMX SU presents a more subtle sound profile, with its tactile qualities yet to be fully described. Although both switches cater to different preferences, users can expect an engaging typing experience with either option, and the choice ultimately may come down to individual taste regarding sound and aesthetics.

Conclusion

To wrap up, choosing between the HMX Blue Topaz linear switch and the HMX SU linear switch really depends on your preferences and what you prioritize in your typing experience. If you enjoy a lightweight feel with a super smooth actuation that allows for effortless typing, the Blue Topaz would be an excellent choice. It is particularly well-suited for those who type for long durations, as its easy-to-press nature reduces finger fatigue while providing a delightful clacky sound that enhances your overall experience. On the other hand, if you prefer a switch that offers a subtle yet deep sound profile with a bit more resistance, the HMX SU may be more to your liking. The slightly heavier bottom out force provides a firmer feel, which some users might find more satisfying, especially during gaming or when you require more feedback from your keystrokes. Ultimately, both switches are light and enjoyable, but your decision should align with whether you value a smooth, light touch or a bit more resistance with a unique acoustic signature.

Mentioned in this article

HMX Blue Topaz Linear

$4.00

$3.49 per 10

Learn more

HMX SU Linear

$3.50

$3.29 per 10

Learn more