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HMX Jelly vs. Jerrzi Poseidon

An in-depth look at the HMX Jelly and the Jerrzi Poseidon switches—which one is the best fit for you?

Overview

When it comes to mechanical keyboard switches, the HMX Jelly and the Jerrzi Poseidon both fall into the linear switch category, yet they cater to different preferences and typing experiences. The HMX Jelly is celebrated for its satisfying, low-pitched “thocky” sound signature and exceptionally smooth feel, thanks to its outstanding factory lubrication. This lightweight switch, requiring only a 42g actuation force, is perfect for those who prioritize a gentle yet responsive keypress. On the other hand, while the Jerrzi Poseidon lacks a distinctive sound signature, it offers its own unique touch, making it a solid option for users seeking a balanced and reliable linear switch. Choosing between the two often comes down to personal preference: the Jelly may appeal to those yearning for that deep auditory feedback, while the Poseidon could attract those looking for a more subdued typing experience. 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

42g

Actuation force

40g

Bottom-out force

48g

Bottom-out force

N/A

Pre-travel

2.00 mm

Pre-travel

1.60 mm

Total travel

3.80 mm

Total travel

3.40 mm

Factory lubed

Yes

Factory lubed

Yes

Stem construction

Standard

Stem construction

Box

Stem material

T2

Stem material

pom

Top housing material

Nylon

Top housing material

POM

Bottom housing material

Nylon

Bottom housing material

POM

Mount type

PCB (5-pin)

Mount type

PCB (5-pin)

Spring

22mm extended single-stage spring

Spring

stainless steel

Housing materials

The HMX Jelly and Jerrzi Poseidon switches utilize different materials in both their top and bottom housings, which influences their acoustic profiles and overall typing experience. The Jelly employs nylon for both its top and bottom housings, utilizing the material’s classic reputation to deliver a deeper and fuller sound. Nylon's softer nature allows it to absorb sound more effectively than harder plastics, resulting in a duller and rounder acoustic profile that is especially pronounced when bottoming out or releasing a key. This seamless integration of housing materials means that both the top and bottom characteristics contribute to a cohesive sound experience, making the overall sound richer and more pleasing.

In contrast, the Poseidon utilizes polyoxymethylene (POM) for both its top and bottom housings. POM, known for its durability and unique acoustic properties, creates a sound profile that is also deep and muted but distinctively different from that of nylon. Although POM is also a softer material compared to harder plastics, it is less absorptive than nylon, leading to a unique sound signature that prioritizes clarity without overshadowing resonance. The housing materials’ resonance in the Poseidon can result in a more pronounced sound when releasing a key, while the bottom-out characteristics remain distinctly muted.

Despite the differences in materials, both switches aim to provide a deep and immersive typing experience. When comparing the performances of the Jelly and Poseidon, users can expect similar results in the overall sound profile due to the shared emphasis on deeper acoustic qualities. However, those keen on the subtleties of sound will notice the pronounced traits each material brings to the table; while the Jelly offers a fuller and more rounded auditory experience thanks to nylon's absorption qualities, the Poseidon leans towards a clearer, more defined sound characteristic, thanks to the properties of POM. Users can thus choose based on their preference for these nuanced differences while still enjoying a satisfying typing experience in both cases.

Weight

When comparing the HMX Jelly linear switch and the Jerrzi Poseidon linear switch, we find that the actuation forces are quite close, with the Jelly requiring 42 grams and the Poseidon at 40 grams. This slight difference indicates that the Jelly necessitates a bit more effort to trigger a keystroke. On the other hand, the Jelly's bottom out force is measured at 48 grams, showcasing a clear distinction in how firm the Jelly feels when pressed all the way down. In contrast, the Poseidon does not have an available bottom out force, leaving this comparison incomplete. Consequently, the Jelly switch is the heavier option overall, as its actuation and bottom out forces both exceed that of the Poseidon’s actuation force. The Jelly's higher weight may cater to users who prefer a more substantial typing experience, while the lighter Poseidon may appeal to those who prefer a gentler touch, although its overall performance remains uncertain without its bottom out specification.

Travel distance

When comparing the travel distance of the HMX Jelly linear switch and the Jerrzi Poseidon linear switch, the Jelly switch has a longer travel distance of 3.8 mm, while the Poseidon switch offers a shorter travel distance of 3.4 mm. This difference indicates that if you're seeking a more responsive experience suitable for gaming, the Poseidon might be advantageous due to its reduced travel distance. Conversely, if you prefer a more substantial feel when pressing the keys, the Jelly's greater travel distance may provide a more satisfying depth. Thus, the Jelly caters to those who enjoy a hearty keystroke, while the Poseidon is ideal for those who prioritize quick reactions.

Price comparison

Which switch is more bang for your buck?

The HMX Jelly has an MSRP of $3.50 per 10 switches. At Milktooth, we are able to pass on savings to our customers and offer the Jelly for $2.99.

The Jerrzi Poseidon has an MSRP of $4.00 per 10 switches. At Milktooth, we are able to pass on savings to our customers and offer the Poseidon for $3.59.

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 Jelly linear switch is known for its low-pitched, deep, thocky sound signature, which many users find satisfying and pleasant to type on. This quality can contribute to a more enjoyable typing experience, especially for those who appreciate a more acoustic feedback. On the other hand, the Jerrzi Poseidon linear switch does not have a specified sound profile, making it difficult to compare directly. Generally speaking, sound quality can vary depending on the keyboard used, as well as the choice of keycaps, so even if the Poseidon is silent in its description, it might still produce an acceptable sound based on external factors.

When it comes to feel, the Jelly switch is praised for its super smooth action, largely attributed to its excellent factory lubrication. This smoothness can be a significant advantage for typists and gamers alike, as it enhances the overall experience when pressing keys. In contrast, details about the feel of the Poseidon switch are absent, leaving uncertainty regarding its tactile characteristics. While the Jelly's light actuation force of 42 grams provides a gentle touch, the Poseidon’s feel remains unknown, which may lead users to question its responsiveness and comfort.

In conclusion, if you're considering mechanical switches for your keyboard, the HMX Jelly linear switch certainly stands out with its rich auditory experience and fluid action, making it a solid choice for many users. Meanwhile, the Jerrzi Poseidon linear switch lacks specific information in terms of sound and feel, leaving it an enigma in comparison. Ultimately, both switches serve different preferences, but with the Jelly's established qualities, it is likely to deliver a more defined and enjoyable performance overall.

Conclusion

To conclude, when choosing between the HMX Jelly linear switch and the Jerrzi Poseidon linear switch, it’s essential to consider your personal preferences and typing style. If you enjoy a smooth and lightweight key press with a delightful, low-pitched, thocky sound, the HMX Jelly is an excellent choice. With its 42g actuation force and 48g bottom-out force, it’s perfect for prolonged typing sessions or fast-paced gaming, making it ideal for users who favor a tactile yet subtle auditory feedback without being overly loud. On the other hand, the Poseidon switch, which lacks specific details on its characteristics and sound profile, may not be as reliable for your needs if you prioritize a defined actuation and auditory signature in your typing experience. Ultimately, if you're seeking consistency and a pleasing acoustic response with a comfortable actuation weight, opt for the HMX Jelly. However, if you are open to experimenting and perhaps prefer a different typing experience that the Poseidon might offer, it may also deserve consideration despite its ambiguity. In the end, your choice should reflect the tactile and auditory qualities that resonate with you most.

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