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HMX SU vs. Gazzew U4

An in-depth look at the HMX SU and the Gazzew U4 switches—which one is the best fit for you?

Overview

When it comes to mechanical keyboard switches, enthusiasts often find themselves torn between options that cater to different typing preferences and styles. The HMX SU, a linear switch, is celebrated for its full PA12 housing and T5 stem, which together produce a deep, yet subtle sound profile, making it an excellent choice for users who prefer a smooth, consistent keystroke without the tactile feedback. In contrast, the Gazzew U4 offers a more tactile experience, featuring a pronounced bump that many typists find sharp and exhilarating, along with a plush bottom-out sensation that adds to its appeal. Its whisper-quiet operation allows for silent typing sessions, making it a great fit for office environments or shared spaces. Ultimately, the choice between these switches boils down to personal preference, with the HMX SU catering to those who enjoy linear smoothness, while the Gazzew U4 satisfies those who appreciate tactile feedback. 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

45g

Actuation force

45g

Bottom-out force

50g

Bottom-out force

62g

Pre-travel

1.80 mm

Pre-travel

N/A

Total travel

3.60 mm

Total travel

3.60 mm

Factory lubed

Yes

Factory lubed

Yes

Stem construction

Standard

Stem construction

Standard

Stem material

T5

Stem material

POM

Top housing material

Nylon

Top housing material

Proprietary Gazzew blend

Bottom housing material

Nylon

Bottom housing material

Proprietary Gazzew blend

Mount type

PCB (5-pin)

Mount type

PCB (5-pin)

Spring

22mm single-stage spring

Spring

Stainless steel 14mm Korean spring

Housing materials

The HMX SU and Gazzew U4 switches exhibit notable similarities and distinct characteristics in their housing materials, both of which play roles in shaping the tactile experience and acoustic response during typing. The HMX SU features a nylon top housing, known for its classic reputation in switch design. This nylon material contributes to a deeper and fuller sound profile due to its softer texture, which absorbs sound more effectively than harder plastics. The Gazzew U4, on the other hand, utilizes a proprietary blend often referred to as "boba plastic" for its top housing. This blend also emphasizes softness, aiming to deliver a rich and deep sound profile. While both switches leverage soft materials that foster acoustic appeal, the specific compositions of nylon and the Gazzew blend might introduce subtle differences in their overall sound characteristics.

In comparing the bottom housings of both switches, the HMX SU remains true to its nylon roots, similarly utilizing nylon for the bottom housing. Just like its top counterpart, the nylon bottom housing enhances the auditory experience, ensuring a consistent sound profile that resonates well with deeper tones when bottoming out. Conversely, the Gazzew U4 employs its proprietary plastic blend for the bottom housing as well. This consistency in softness across both housings contributes to the U4’s overall sound signature while allowing each layer to contribute significantly to the typing experience. Therefore, while the materials differ, the focus on softness in both designs likely results in a similar auditory output: both provide a rich, full-bodied sound when pressed and released.

Ultimately, the differences in material may influence the nuanced typing feel and sounds associated with each switch, but the underlying principles remain aligned. Both switches—thanks to the soft materials used in their top and bottom housings—will yield a pleasant auditory experience characterized by a deep, rich sound profile. The top housing achieves this by enriching the sound released during key release, while the bottom housing tends to dominate the sound when a key is fully engaged. This means that even if the precise material compositions vary, users can anticipate a somewhat similar performance in both models, emphasizing the importance of softness in enhancing user experience.

Weight

When comparing the HMX SU linear switch and the Gazzew U4 tactile switch, we can observe both similarities and differences in their actuation and bottom-out forces. Both switches share the same actuation force of 45 grams, making them equally light in this regard, which benefits users who favor extended typing sessions or long gaming marathons due to reduced finger fatigue. However, the bottom-out forces reveal a notable contrast: the HMX SU has a lower bottom-out force of 50 grams, while the Gazzew U4 features a heavier bottom-out force of 62 grams. This means that while both switches trigger at the same weight, the Gazzew U4 provides a more substantial feel when bottoming out, appealing to users who prefer a firmer keystroke for a more satisfying typing experience. Overall, for those seeking a lightweight experience, the HMX SU linear switch is the preferred choice, whereas the Gazzew U4 tactile switch offers a heavier alternative for a more pronounced tactile feedback.

Travel distance

The HMX SU linear switch and the Gazzew U4 tactile switch have the same travel distance, measuring 3.6 mm from the top to the bottom. This identical distance means that users pressing down on keys equipped with either switch will experience a similar amount of travel, resulting in comparable feedback and responsiveness while typing. As both switches share this travel distance, users can expect a consistent feel when using either option, making it easier to transition between them without noticeable differences in keypress depth.

Price comparison

Which switch is more bang for your buck?

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.

The Gazzew U4 comes in at $6.50 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 SU linear switch delivers a subtle yet relatively deep sound profile, providing a satisfying auditory experience without being overly loud. The sound is likely characterized by a smooth and muted effect, conducive to a more reserved typing atmosphere. In contrast, the Gazzew U4 tactile switch is designed with a focus on maintaining a whisper-quiet operation. Its muted sound quality minimizes the typical mechanical keystrokes' clackiness, making it ideal for silent work environments. The U4's sound profile is further enhanced by its low-pitched tone, ensuring a mellower auditory experience that contrasts sharply with the sharper sounds produced by other switch types.

When it comes to feel, the HMX SU linear switch is known for its smooth actuation without any tactile feedback, providing a seamless experience as you'd glide from key to key. This quality is ideal for those who prefer uninterrupted key presses, offering less physical resistance during typing. On the other hand, the Gazzew U4 tactile switch presents a markedly different experience; it features a sharp tactile bump that gives a pronounced feedback with each keystroke. This tactile sensation is described as exhilarating and is complemented by a plush, felt-like bottom-out, creating a comfortable and engaging typing environment that many users find appealing.

When considering both switches, it's clear they cater to different typing preferences. The HMX SU is better suited for individuals who favor a smooth, linear experience with subtle sound, while the Gazzew U4 appeals to those desiring a tactile feel with minimal sound disturbance. Each switch has its strengths, and the choice between them ultimately depends on personal typing style and environment. Whether you lean towards the deep, smooth typing of the SU or the sharp tactile feedback of the U4, both will deliver effective results tailored to their respective designs.

Conclusion

To conclude, selecting between the HMX SU linear switch and the Gazzew U4 tactile switch ultimately hinges on your personal preferences and typing style. If you prefer a lighter switch with a smooth and uninterrupted keystroke experience, the SU is an excellent choice, especially for fast typists or gamers who appreciate speed and fluidity in their keystrokes. Its subtle noise profile allows for a more discreet typing experience, making it a solid option for shared spaces. On the other hand, if you enjoy tactile feedback and a more pronounced typing sensation, the U4 is likely the better fit for you. The U4 offers a satisfying tactile bump that can enhance your typing experience, providing both tactile satisfaction and a plush, quiet bottom-out feel that is ideal for office environments or late-night typing without disturbing others. Ultimately, consider how each switch aligns with your priorities—whether it’s the smoothness of a linear switch or the pronounced feedback of a tactile one—to find the perfect match for your keyboard setup.

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