High-End, Neutrally Tuned 8 BA In-Ears
The Mach 80 is Westone’s top-of-the-line in-ear monitor. It features eight proprietary in-house balanced armature drivers and is designed as a professional tool, tuned to be extremely neutral and suitable for studio work and mixing. It is compact, lightweight, and claimed to be very durable. The Mach 80 currently has a list price of around 1700 USD or €1300 before tax, though prices may vary.
The Letshuoer Mystic 8 also features eight balanced armature drivers. They’re made by renowned manufacturers Sonion and Knowles. The Mystic 8 is also tuned very neutrally but designed more with audiophiles in mind, featuring decorative shells made of titanium alloy. The Mystic 8 was launched in early 2025 and is priced at around 999 USD or €850 plus tax.
WESTONE MACH 80 SPECIFICATIONS
- Drivers: 8 balanced armature drivers with 3 way crossover
- Driver Configuration:
- 2 Balanced-Armature Bass Drivers
- 2 Balanced-Armature Midrange Drivers
- 4 Balanced-Armature Treble Drivers
- Sensitivity: 104dB @1kHz
- Impedance: 66 Ohms @1kHz
- Freq Response: 5Hz – 22kHz
- Cable length 127cm / 50 inches
- Cable name: Linum UltraBaX T2 Cable
- Cable connectors: T2 type
- Cable termination: 3.5mm jack
Price and availability:
LETSHUOER MYSTIC 8 SPECIFICATIONS
- Drivers: Balanced Armature (BA)
- Eight Drivers: 4 Sonion BA + 4 Knowles BA
- Sensitivity: 107dB
- Impedance: 18 Ohms
- Frequency response: 20Hz ~ 40kHz
- Shell material: Vapor Black titanium alloy shell
- Cable: 1.25m 8×20-core×0.05mm silver-plated monocrystalline copper cable
- Cable connectors: 2-pin 0.78mm
- Cable termination: 4.4mm balanced plug
Current price and availability:
- Linsoul: Mystic 8
BUILD AND COMFORT
The Mach 80 and the Mystic 8 differ greatly in physical design.
The Mach series is aimed at professionals and features a very small, lightweight, and compact plastic housing. For an eight-driver IEM, it is remarkably small and exceptionally comfortable to wear. The Mach models use legacy nozzles with an outer diameter of 2–3 mm, similar in size to those found on Shure in-ears.
They are equipped with T2 cable connectors, which are thinner than standard options and engineered for durability. Like MMCX connectors, they rotate freely. The included cable, manufactured by the Danish company Linum, is extremely lightweight.
The Mach 80 also ships with a comprehensive professional package: a large, rugged Pelican case, a selection of accessories, tips, maintenance tools, and a soft carrying pouch.
Even though several tips are included, I found the Azla SednaEarFit Crystal ear tips, paired with the small included adapters for the narrow nozzles, to be the best match for the Westone Mach 80 in my case. This combination gives me a secure seal, excellent comfort, and great sound.
The Letshuoer Mystic 8 features a titanium-alloy CNC-Machined housing, making it heavier than the Mach 80, yet it remains very comfortable to wear. It uses the widely available 0.78 mm 2-pin connectors, which makes cable swapping much easier than with the Mach 80.
The Mystic 8 has standard modern-sized nozzles (5–6 mm) that fit most regular IEM tips. I personally prefer Azla SednaEarFit Crystal or Xelastec tips on the Mystic 8, though ear tip choice is always individual. The bore dimensions and tip material can also influence the sound to some degree, but never as much as a bad seal.
The Mystic 8 comes in an elegant, audiophile-oriented package. It includes three types of silicone tips in three sizes, a puck-shaped storage case, and additional luxury items such as a ring and a necklace.
COMPARISONS
A FEW WORDS ABOUT AMPLIFICATION
I used my two Topping A90 amplifiers for this comparison, which are usually versatile and well-performing.
However, I later found that the Mach 80 performed significantly better with a select few amps, and one of the superior solutions was to run it straight out of the built-in amp of the ADI-2 DAC FS. I elaborate on this in my dedicated Mach 80 review.
The Mystic 8 did not change much when run directly from the ADI-2, but the Mach 80 had better detail, articulation, macrodynamics, microdynamics, a larger soundstage, and improved imaging. It was not a complete transformation, and the main differences between the two IEMs remained, but the overall sound quality of the Mach 80 improved notably.
That said, the comparison below was performed with the Topping A90 for both. While it is not a bad amplifier for the Mach 80, it is not the optimal match, so keep that in mind. I will, however, occasionally comment on the Mach 80 paired with the ADI-2.
TRACK BY TRACK COMPARISON
Associated equipment:
- Amplifier: Topping A90
- DAC: RME ADI-2 DAC FS
- Both IEMs using Azla SednaEarFit ear tips – Crystal on Mach 80, Xelastec on the Mystic 8
Hunting High And Low – MTV Unplugged by a-ha
Starting with the Mach 80, the vocals are absolutely wonderful. The tonal balance is excellent, allowing the vocals to shine, while the orchestra sits slightly in the background. The Mystic 8 brings the rest of the orchestra more into focus, with a crisper presentation. It offers more articulate instrument separation and a wider soundstage, though not necessarily more detail.
The Sun Always Shines on TV MTV Unplugged by a-ha
Again, the Mach 80 is very smooth yet detailed. The Mystic 8 has a similar tonality but is crisper, more articulate, and more open, though less smooth. Details are more upfront and explicit with the Mystic 8, while they are subtler with the Mach 80.
Dyna I by Karl Strømme
The Mach 80 has a modest bass in quantity but high in quality. The trumpet sounds very smooth with excellent timbre, and the overall presentation is natural, smooth, yet detailed. Compared to most earphones today, it is rather midrange-centric but still nicely balanced. Its midrange is simply delightful.
The Mystic 8 is more articulate, there’s more happening in the music, to put it that way. Notes are a bit crisper and sharper, though the overall tuning is quite similar.
Hello Dave by Michael Wollny
The Mystic 8 is snappy and articulate, neutrally tuned, with excellent instrument separation and imaging. The Mach 80 trades some articulation for smoothness but remains just as detailed, offering a very refined and subtle sound.
Fata Morgana by Spiritbox
Time for some prog metal. The Mach 80 is very smooth, perhaps a bit too smooth for this genre. The Mystic 8 is more entertaining, with a more vividly articulate presentation where elements pop out more. However, this track benefits from bassier earphones, and both of these are equally neutral.
As Before by Olga Konkova
The Mystic 8 is crisp and clear, snappy and articulate. The cajón drum has excellent punch, even without boosted bass. Vocals are upfront and vivid, and the piano sounds crisp and weighty.
The Mach 80 is relatively similar but smoother and sweeter. The vocals are exceptional, while the piano is less hard-hitting compared to the Mystic 8.
It Could Be Sweet by Portishead
The Mach 80 is nicely balanced. The bass is present but never overpowering. Vocals are smooth, refined, and nuanced. There is plenty of detail, but it is delivered very subtly.
The Mystic 8 is somewhat different, though the overall tonality is similar. It is crisper and more articulate, with details presented more upfront rather than subtly.
Escape Route by Boris Blank
The Mystic 8 is very dynamic and spacious, with excellent imaging. The trumpet is crisp and clear, and there is a sense of a lot going on in the music; busy sounding but in a pleasing way.
The Mach 80 features thicker-sounding bass and smoother trumpets, but the overall presentation is less energetic.
Spontaneous Compositorius by Thomas Agergard
The Mach 80 renders the saxophone beautifully. The treble in the bright percussion is sharp but not harsh, and the bass carries a lot of detail while remaining smooth.
The Mystic 8 is slightly brighter in the midrange, though the saxophone remains smooth. The bass is a bit tighter, and the treble intensive percussion is similar to the Mach 80—bright and crisp but not harsh.
Mahler’s Symphony No 2 III by Paavo Järvi
The kettle drums are tight and punchy on the Mystic 8, while the strings are smooth and detailed. The Mach 80 sounds a bit warmer and even smoother, offering a softer but highly nuanced presentation.
Young Vivaldi by Modo Antiquo
The Mach 80 has a beautiful instrument timbre, smooth and refined with a delicate warmth. The Mystic 8 has a slightly crisper character with more attack and energy. Both are excellent.
Sunrise by Norah Jones
The Mystic 8 is well balanced, with vocals that are upfront and energetic. The Mach 80 presents smoother vocals with a warmer touch, though overall they are quite similar.
WRAPPING IT UP
Sound Signature
The Mach 80 and Mystic 8 share a very similar sound signature that is neutral and well balanced. The bass goes deep without being overpowering, and the midrange receives the focus it deserves. The main difference lies in their presentation style: the Mystic 8 is crisper, while the Mach 80 leans smoother.
Treble
Both have a nicely extended and well-behaved treble. The Mystic 8 is crisper and more articulate, while the Mach 80 is smoother, yet both reveal a lot of detail.
Midrange
The midrange is very nice on both. The Mystic 8 is crisper, brighter, and more articulate, while the Mach 80 is smoother and more subtle and refined.
Bass
Both have a neutral bass presence with high-quality performance. If you want an elevated bass response, you will need to look elsewhere or use EQ. They are not identical, however: the Mach 80 is slightly softer, fuller, and warmer, while the Mystic 8 is a bit tighter.
Soundstage and Imaging
They have similar soundstage sizes.
The Mystic 8 offers better instrument separation and articulation, making the imaging more pronounced than the Mach 80 powered by the Topping A90, which requires that you “lean in” more.
However, when powered directly from the ADI-2 DAC FS, the imaging of the Mach 80 improves significantly and is at least on par with the Mystic 8.
Detail, Dynamics, and Timbre
Both have excellent detail. The Mystic 8 is more articulate, with details that stand out. Powered by the Topping A90, the Mach 80 delivers the detail in a subtler, more refined manner. Powered by the ADI-2, it is still refined-sounding but details are more articulate and the refinement level is even higher.
Macrodynamics are similar, but the Mystic 8 is slightly stronger in that area than the Mach 80 powered by the A90. When it comes to microdynamics, the Mystic 8 is also more outspoken, with stronger articulation. The Mach 80 excels in smoothness and subtle nuances.
However, when powered by the ADI-2, the Mach 80 gets better macrodynamics and microdynamics – yet still feels smoother than the Mystic 8.
Timbre is generally relatively similar, but the Mach 80 is consistently smoother and warmer, especially in the bass and midrange, while the Mystic 8 is slightly brighter, energetic, and crisper.
CONCLUSION
The Westone Mach 80 and Letshuoer Mystic 8 are both excellent in-ear monitors, featuring a neutral tuning and a high level of detail.
While their tonal balance is similar, their character differs. The Mystic 8 is more articulate, slightly brighter, tighter, and crisper. The Mach 80 feels more refined and smoother, especially when powered by the Topping A90. Driven directly from the ADI-2 DAC FS, however, the Mach 80 becomes noticeably tighter and more detailed, with stronger articulation—yet it still feels smoother than the Mystic 8.
The Mystic 8 is a typical modern-sized IEM, while the Mach 80 is very small and lightweight, appealing to professionals. The Mach uses the sturdy rotating T2 connectors, whereas the Mystic 8 uses the widely used 2-pin connectors. Professional-oriented accessories might add to the Mach 80’s appeal.
While both are expensive IEMs, there is still a significant price difference: the Mach 80 is typically more than fifty percent higher in price than the already costly Mystic 8. As is common in the high-end audio market, paying fifty percent more does not guarantee fifty percent better sound. For instance, the Mach 80 does not provide fifty percent more detail, rather a similar level (or a slight increase, depending on the amplifier) of detail but in a smoother presentation and a smaller, more compact package.
In conclusion, the Letshuoer Mystic 8 and Westone Mach 80 are both fantastic-sounding, well-built IEMs that I can highly recommend. Whether the cost is justified has no objective answer.
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- Linsoul: Mystic 8
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