Letshuoer S15 review, main photo, IEMs are laying next to the cable.

Letshuoer S15

Letshuoer S15, an IEM with 14.6 mm planar driver and one passive driver. It's a successor of a very popular Letshuoer S12, priced at $329.

Introduction to the Letshuoer S15 review

Letshuoer S15 in the box

I’ll be honest with you — my initial experience with Letshuoers product didn’t quite tickle my audiophile senses. However, that was a few years ago, and I firmly believe in second chances, so here we are, ready to explore the Letshuoer S15 IEMs priced at $329. Strap in as we take a deep dive into the sound quality and craftsmanship of reviewed earphones. But before we immerse ourselves in the sonic realm, let’s take a moment to appreciate the inspiring story behind Letshuoer.

Letshuoer is a relatively new name vying for attention in the competitive audiophile landscape. Born out of a pure passion for musical perfection, the company has dedicated itself to bridging the gap between audio enthusiasts and top-notch sound reproduction. With a mission to create IEMs that transport listeners to a world of unparalleled sonic bliss, Letshuoer has emerged as a promising contender.

The Letshuoer S15, priced at three times its predecessor, the S12, steps into a competitive market with bold ambitions. As it ventures into a popular and competitive price bracket, the question looms: Can the S15 justify its tripled price tag? This successor faces the challenge of not just meeting but exceeding the expectations set by its more affordable forerunner. Will the increased cost translate into a substantial leap in audio excellence, or will it struggle to carve its niche in a market teeming with formidable contenders?

As I embark on this auditory exploration, armed with my previous Letshuoer experience, I approach the S15 with a blend of curiosity and skepticism, but as always I’m trying to be objective and honest. Join me as we unravel the Letshuoer S15 in this review, navigating the intricate web of sonic nuances and exploring whether this chapter marks a turning point in the brand’s quest for audio excellence.

Packaging of tested Letshuoer S15

Packaging of tested Letshuoer S15

Let’s now turn our attention to the packaging and discover what lies within the box of the tested Letshuoer S15 IEMs. Upon opening the sturdy package, you are greeted by a sight that exudes elegance and meticulous attention to detail. The unboxing experience itself feels like unwrapping a treasure trove of audio goodness. Maybe it’s not the level of the high-end brands, but it’s also a different price bracket.

Inside the package, you will find an unordinarily crafted carrying case designed to add a touch of luxury to your audio journey. The case is rather big and made from a combination of high-quality materials, not only provides exceptional protection for your Letshuoer S15 IEMs but also serves as a stylish statement of your audiophile dedication. It is very light, but the downside is that it’s hard to clean. The fingerprints are getting all over it rather quick. 

However, at first, you will discover the tested Letshuoer S15 IEMs themselves, waiting to take you on an immersive sonic adventure. Crafted with precision and finesse, these earphones boast a sleek and modern design that reflects the brand’s commitment to both aesthetics and functionality. 

Accompanying the reviewed Letshuoer S15 IEMs is a detachable cable that connects effortlessly to the earphones. In addition, Letshuoer provides two types of silicone ear tips in varying sizes, allowing you to find the perfect fit and maximize sound isolation for an optimal listening experience. The cable has detachable jack connectors, ale you’ll find all three sizes inside the box. 

However, it is worth noting that one notable omission from the accessory package is the absence of foam tips. Foam tips have long been favored by many audiophiles for their exceptional seal, enhanced comfort, and improved sound isolation properties. While the Letshuoer S15 package delivers a premium feeling, one might consider swapping the luxurious packaging for a set or two of foam tips to further elevate the listening experience. And I’m one of them. 

Despite the lack of foam tips, the packaging of the Letshuoer S15 IEMs certainly impresses, leaving a lasting impression of quality and sophistication. It is clear that Letshuoer has put considerable effort into providing a complete package that caters to audiophiles seeking both outstanding sound performance and an aesthetically pleasing unboxing experience.

Build Quality and Comfort

Now let’s delve into the build quality of the Letshuoer S15 IEMs. While not the most popular choice at $300, Letshuoer has opted for a combination of materials in their construction. The inner part of the IEMs is made using a plastic material. This choice has its advantages, particularly during colder weather, as the plastic doesn’t become as cold to the touch as metal would. However, I’d prefer the premium feel of metal throughout the construction.

The faceplate of the Letshuoer S15 IEMs is where the design gets great. It is beautifully crafted and adds a touch of visual appeal to the earphones. Interestingly, when turned upside down, the looks of the IEMs improve significantly in my opinion, showcasing a more unique and eye-catching aesthetic. It’s simple, but still great.

In terms of overall build quality, reviewed Letshuoer S15 IEMs are satisfactory. The materials used seem durable, and they are likely to withstand the rigors of daily use. However, it’s worth noting that the 2-pin connector, which attaches the cable to the IEMs, could be a little tighter. This slight looseness may cause concerns for those who prioritize a secure connection and worry about potential connection problems in the long run.

Moving on to the cable and detachable jack connectors, the Letshuoer S15 delivers a positive experience. The cable itself is soft and smooth, providing a pleasant feel against your skin. Its lightweight nature adds to the overall comfort, ensuring that you can wear the IEMs for extended periods without discomfort.

The appearance of the cable is also commendable, with a sleek and aesthetically pleasing design that complements the overall look of the Letshuoer S15. It lends a touch of elegance to the IEMs and enhances the premium feeling.

Furthermore, the detachable jack connectors work well in allowing you to easily swap out the cable or connect to different audio sources. However, it’s important to note that there have been occasional instances of the connector detaching from the cable. To enhance the reliability of the connection, the inclusion of a locking mechanism would be a valuable addition. This would provide users with peace of mind, ensuring that the connection remains secure even during rigorous activities or accidental tugs on the cable.

When it comes to comfort, the Letshuoer S15 exhibits a lightweight and compact design, yet its fit might not be universally comfortable. For individuals with smaller ears, like mine, the top part can induce discomfort and even slight pain. Strangely, I’ve found this issue to be isolated to my left ear, with the right one experiencing a more comfortable fit. It’s a bit puzzling, especially considering my prior ease with larger IEMs that didn’t pose similar problems. 

On the bright side, the Letshuoer S15 doesn’t disappoint in terms of sound isolation. While it might not completely shield against the thunderous noise of planes or the immersive atmosphere of a live concert, its performance is commendable in quieter settings, such as my residential neighborhood. The S15 strikes a reasonable balance, providing adequate isolation without entirely cutting off the ambient soundscape. Despite the comfort nuances, the S15 manages to hold its ground, making it a suitable choice for everyday listening in more serene environments.

How does the reviewed Letshuoer S15 sound?

Closeup on reviewed Letshuoer s15 faceplate

Delving into the auditory realm of the Letshuoer S15, the sound signature unveils itself as a familiar and widely embraced U-shaped profile. This configuration typically promises a dynamic and engaging listening experience, with emphasized lows and highs. In the case of the S15, this holds true, albeit not without its nuances. The bass, in particular, occasionally takes center stage, asserting its presence with fervor. Instances like “Die for You” by The Weeknd and Miley Cyrus reveal the S15’s inclination to deliver a robust low end, sometimes bordering on the overwhelming, especially in tracks where the sub-bass dominates, and the composition lacks complexity.

However, the Letshuoer S15 truly shines when paired with live and fast-paced tracks, finding its sweet spot in the energetic beats and vibrant instrumentation of songs like “Sultans of Swing” by Dire Straits. Soft guitar, precision of the drums, and the nuanced vocals’ interplay seamlessly, allowing the S15 to showcase its prowess in delivering a lively and immersive performance. Transitioning to “Bohemian Rhapsody” by Queen, the S15 demonstrates its power, navigating through the iconic changes in tempo and genre seamlessly. The thunderous lows complement the operatic highs, creating a vivid sonic landscape that captures the essence of this multifaceted masterpiece.

An interesting facet of the reviewed IEMs is its surprising ease of drive. Despite the inclusion of a planar driver dedicated to low-end frequencies, these IEMs don’t demand a powerhouse of an amplifier to unleash their full potential. Whether connected to a cheap DAC or a portable player, the S15 adapts effortlessly, making them an accessible and versatile choice for audiophiles on the go. 

The bass takes center stage with a powerful presence, particularly in the sub-bass frequencies. However, this potency isn’t always a virtue, especially when faced with compositions lacking the robust kickbass and midbass elements. For instance, in “Have You Ever Seen the Rain” by Creedence Clearwater Revival, there’s not much subbass, resulting in a somewhat monotonous listening experience. The absence of a pronounced midbass and kickbass in this context leaves the rendition feeling a tad lackluster, catering less to personal taste.

On the flip side, reviewed Letshuoer S15 finds its stride in tracks like “Humble” by Kendrick Lamar, where the low-end demands attention. Here, the sub-bass exudes a moist, juicy, and thick quality that resonates with power, almost making me sit down and becoming humble. The S15’s prowess in delivering a visceral low-end experience shines through in such dynamic compositions, showcasing its potential to elevate the listening experience in genres that demand a more pronounced bass presence.

However, while the S15 excels in delivering a powerful bass experience, it reveals limitations in its dynamic range. The bass, though undeniably impactful, tends to exhibit a somewhat one-dimensional quality, lacking the flexibility and nuance required for a more dynamic approach. This becomes apparent in tracks that demand a broader spectrum of bass intricacies, where the S15 may fall short in capturing the nuanced shifts and subtleties that define a truly dynamic low-end.

Turning our focus to the midrange, the Letshuoer S15 exhibits a somewhat withdrawn and mellow character, with a tendency to gloss over finer details, particularly in busy and intricate compositions. This subdued quality becomes evident in tracks where a multitude of elements converges, causing the midrange to lose a degree of its distinctiveness. Alluring vocal performances, such as in “Paint the Town Red” by Doja Cat, may come across as smooth but somewhat lacking in the intricacies that could elevate them to a more engaging level, especially when immersed in a bustling musical backdrop.

However, the S15 redeems itself in a more stripped-down setting, such as in “What Was I Made For” by Billie Eilish. In this composition, where the focus narrows to the artist’s voice against a calmer musical backdrop, the midrange of the S15 thrives. The mellow tonality enhances the intimacy of the vocals, allowing them to resonate with a captivating smoothness. It’s in these moments of solitude that the S15 showcases its ability to bring out the best in vocal performances, offering a more compelling and immersive experience when the musical landscape is less crowded.

While the midrange of the Letshuoer S15 may not be the most detailed or dynamic, its strengths lie in creating an intimate sonic space that allows vocal performances to shine, provided the musical context aligns with its mellower tonal profile.

Exploring the treble of the reviewed Letshuoer S15 introduces an interesting dimension to the listening experience. Despite prevalent comments suggesting a metallic tinge, my experience leans slightly different. The treble, while not inherently metallic, maintains a delicate balance that edges towards sibilance, especially when paired with brighter amplifiers. This nuanced interplay adds a subtle spark that, personally, brings vibrancy to the overall listening experience. However, it’s crucial to recognize that this brightness may not be universally appreciated.

For those who enjoy occasional brilliance, the Letshuoer S15’s treble delivers a commendable performance, infusing moments of liveliness into the auditory canvas. Tracks relying on intricate high-frequency details, like “Riders on the Storm” by The Doors, benefit from the S15’s treble character, highlighting the subtle nuances of cymbals and high hats. Nevertheless, it’s important to note that this brightness approaches sibilance, potentially causing discomfort for listeners favoring a more restrained treble presentation.

The soundstage of the Letshuoer S15 is characterized by a relatively flat presentation that envelops the listener, creating an expansive field that circumnavigates the head, leaving the space in front and behind perceptibly vacant. Despite this spatial layout, the S15 excels in delivering a natural and captivating auditory experience, enhanced by its impressive holography. The sound sources exhibit diverse sizes, and even when set at the same distance, the S15 adeptly conceals these differences, requiring a more discerning analysis to unveil such subtleties.

This nuanced approach to soundstage intricacies contributes to the S15’s ability to offer a realistic and immersive listening experience. The holographic quality adds a layer of depth, allowing sound sources to manifest with distinct sizes and spatial placements. It’s a testament to the S15’s prowess that, upon casual listening, these variations may go unnoticed, demanding a deeper analysis to unravel the intricacies subtly woven into the fabric of the soundstage.

Beyond the realm of music, the Letshuoer S15’s soundstage proves to be a valuable asset for gamers, particularly in first-person shooter (FPS) games. The spatial presentation provides a sense of directionality and positional awareness, enhancing the overall gaming experience. Whether it’s the distant echo of footsteps or the reverberation of gunfire, the S15’s soundstage proves to be a strategic ally, adding an immersive layer to the virtual landscape.



Drawing a comparison between the Letshuoer S15, the focal point of this review, and the Campfire Audio Honeydew, released in 2021, reveals intriguing parallels and distinctions. Both exhibit a bass-heavy character, yet the S15 surpasses the Honeydew in the sub-bass realm, offering a more pronounced and robust sub-bass performance. However, the S15 falls short in the energy department, particularly in the mid and kickbass frequencies, creating a different balance compared to the Honeydew.

In the midrange, the S15 takes on a softer, more delicate, and denser profile. This characteristic might resonate with those who found the texture of the Honeydew’s midrange less appealing. The S15’s midrange exudes a gentler quality, potentially catering to listeners seeking a smoother and more nuanced presentation in this frequency range.

Where the Letshuoer S15 and the Campfire Audio Honeydew diverge significantly is in their soundstage characteristics. The Honeydew boasts thicker sound sources and greater height, while the S15 excels in holography. This distinction becomes a crucial factor for those who prioritize a vivid and immersive soundstage experience, as the tested Letshuoer S15 takes a different approach compared to the Honeydew.

Letshuoer S15 Review – Summary

Reviewed Letshuoer S15

My journey with the Letshuoer S15 has been marked by a lingering uncertainty regarding my overall satisfaction. These in-ear monitors (IEMs) distinctly cater to a specific audience, given their non-universal sonic profile. The pronounced emphasis on sub-bass and the softer midrange might resonate with certain listeners, yet it creates a sonic fingerprint that doesn’t universally align with broader expectations. At least, I think so. Maybe they have much greater target than I assume. 

Adding to the contemplation is the pricing strategy employed for the S15. Notably higher than its predecessor, the S15’s cost prompts scrutiny about the perceived value it brings to the table. That brings the expectations to be higher, and only the time will tell if they have been fulfilled.

Big thanks to Letshuoer for providing the S15 for this review. I wasn’t paid or asked to say anything good or bad about this product, all of the above is just my personal, unbiased opinion.