HMX Blue Topaz vs. Kailh Plum
An in-depth look at the HMX Blue Topaz and the Kailh Plum switches—which one is the best fit for you?
Overview
When it comes to mechanical keyboard switches, the HMX Blue Topaz and the Kailh Plum offer unique features that cater to different preferences. The Blue Topaz is a linear switch that stands out for its smooth actuation and lightweight feel, providing a seamless typing experience with a satisfyingly clacky sound. On the other hand, the Kailh Plum is a tactile switch that offers a hefty feel without a significant tactile bump, making it a distinctive choice for those who enjoy a neutral and mildly stepped sound profile. Both switches have their own strengths and characteristics that make them appealing to different users. 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
40g
Actuation force
N/A
Bottom-out force
48g
Bottom-out force
70g
Pre-travel
2.00 mm
Pre-travel
1.70 mm
Total travel
3.90 mm
Total travel
3.60 mm
Factory lubed
Yes
Factory lubed
No
Stem construction
Standard
Stem construction
Standard
Stem material
Ly
Stem material
POM
Top housing material
Polycarbonate
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
Both the HMX Blue Topaz and the Kailh Plum switches utilize polycarbonate for their top housing, resulting in a sharper, higher-pitched, and crisper sound profile. Polycarbonate is known for being a relatively stiffer plastic, which enhances the clarity and resonance of the sound produced by the switch. Additionally, its translucency makes it a popular choice for switches designed with RGB lighting in mind. The similarities in their top housing material indicate that users can expect similar audio feedback and aesthetics from both switches.
In terms of bottom housing material, both the Blue Topaz and the Plum switches feature nylon. Typing on switches with nylon bottom housings tends to elicit a deeper and fuller sound profile, as nylon is a softer plastic that absorbs more sound compared to harder plastics. This results in a duller and rounder sound, enhancing the overall typing experience. Despite both switches using nylon for their bottom housing, the variations in sound and feel are likely to be noticeable due to the impact of the bottom housing material on the bottom-out sound and feel.
It is important to note that the qualities of the housing materials are distributed differently in the HMX Blue Topaz and the Kailh Plum switches. The bottom housing primarily influences the bottom-out sound and feel when a key is fully pressed, while the top housing has a greater impact on the sound produced when a key is released. This distinction showcases how the choice of housing materials can affect different aspects of the typing experience, offering users a unique tactile and auditory feedback depending on the switch they choose.
Weight
The HMX Blue Topaz linear switch has a lighter actuation force of 40 grams and a lighter bottom out force of 48 grams, making it a good choice for those who prefer a lighter typing experience. In contrast, the Kailh Plum tactile switch has a heavier bottom out force of 70 grams, providing a more substantial push feel. While the actuation force of the Plum switch is unknown, the heavier bottom out force suggests that it may require a firmer push compared to the Blue Topaz. Depending on preference, some may find the lighter actuation force of the Blue Topaz more comfortable for longer typing sessions, while others may prefer the heavier bottom out force of the Plum switch for a more tactile typing experience. Ultimately, the choice between the two switches will depend on individual typing preferences and whether a lighter or heavier force is desired.
Travel distance
When comparing the travel distance of the HMX Blue Topaz linear switch and the Kailh Plum tactile switch, the Blue Topaz has a longer travel distance of 3.9 mm compared to the Plum's 3.6 mm. Both switches fall within the range of shorter travel distances that are popular for faster response times, particularly among gamers. The shorter travel distance of the Plum switch may provide a quicker key press response, while the slightly longer travel distance of the Blue Topaz may offer a more substantial feel when typing. Ultimately, the choice between the two will depend on personal preference for travel distance and key press sensitivity.
Price comparison
Which switch is more bang for your buck?
The HMX Blue Topaz has an MSRP of $4.00 per 10 switches. At Milktooth, we are able to pass on savings to our customers and offer the Blue Topaz for $3.49.
The Kailh Plum comes in at $6.25 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
Overall, the HMX Blue Topaz linear switch stands out for its smooth actuation and lightweight feel, providing a satisfying typing experience with a visually striking design and clacky sound profile. On the other hand, the Kailh Plum tactile switch offers a unique tactile experience with a heavier feel and subtle tactility, accompanied by a neutral and enjoyable sound profile. While the Blue Topaz excels in easy-to-press key presses, the Plum provides a mild and approachable typing experience with a stepped tactile feel. Both switches offer distinct qualities that cater to different preferences, so choosing between the two would depend on individual typing preferences. In terms of sound, the Blue Topaz leans towards a crisp and percussive clacky sound, while the Plum offers a more neutral and versatile sound profile. In terms of feel, the Blue Topaz provides a light and effortless typing experience, while the Plum offers a gentle and approachable tactile feel. Ultimately, both switches provide quality performance, and regardless of choice, users can expect a satisfactory typing experience.
Conclusion
In closing, when deciding between the HMX Blue Topaz linear switch and the Kailh Plum tactile switch, consider the level of actuation force you prefer. If you enjoy a lighter touch and smooth actuation, the Blue Topaz may be the ideal choice for you. The distinctive glitter housing and clacky sound signature add to the overall typing experience. On the other hand, if you prefer a medium-heavy bottom out force and a unique tactile feedback without a pronounced bump, the Plum switch could be more suited to your preferences. The neutral sound profile and stepped tactile feel offer a different typing experience compared to traditional tactile switches. Ultimately, your choice will depend on your personal preferences for actuation force, sound, and tactile feedback. Make sure to consider these factors when selecting the keyboard switch that best fits your typing style and preferences.
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