ThieAudio Monarch MK4 VS Dunu Glacier
Aggregated Scores from Top Experts & Community
ThieAudio Monarch MK4 Aggregated Review Score
ThieAudio Monarch MK4 Average Reviewer Scores
Average Reviewer Score:
8.6Very Positive
Dunu Glacier Aggregated Review Score
Dunu Glacier Average Reviewer Scores
Average Reviewer Score:
8.7Very Positive
ThieAudio Monarch MK4 Details
Driver Configuration: 2DD+6BA+2EST
Tuning Type: Harman with bass switch
Price (Msrp): $1,149
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Dunu Glacier Details
Driver Configuration: 1DD+4BA+4EST
Tuning Type: Harman with bass boost
Price (Msrp): $1,349.99
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ThieAudio Monarch MK4 User Review Score
ThieAudio Monarch MK4 Average User Scores
Average User Score:
Based on 1 user reviews
9Overwhelmingly Positive
Dunu Glacier User Review Score
Dunu Glacier Average User Scores
Average User Score:
Based on 1 user reviews
9Overwhelmingly Positive
ThieAudio Monarch MK4 Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
9.3Gaming Grade
SDunu Glacier Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
7.6Gaming Grade
AThieAudio Monarch MK4 Scorings
Average Technical & Tuning Grades
Average Tunign Grade
S- Highly polished technical execution. Excellent frequency synergy creates an immersive experience. Enhances musical content.
Average Technical Grade
S- Excellent clarity and detail. Precise imaging and expansive soundstage. Manages complex passages with minimal smearing and good transient speed.
Dunu Glacier Scorings
Average Technical & Tuning Grades
Average Tunign Grade
A+- Refined execution with coherent frequency integration. Natural timbre reproduction and engaging presentation. Strong versatility.
Average Technical Grade
S-- Excellent clarity and detail. Precise imaging and expansive soundstage. Manages complex passages with minimal smearing and good transient speed.
ThieAudio Monarch MK4 Reviews
ThieAudio Monarch MK4 reviewed by: Jays Audio
9
Reviewer Score
Smooth, clean, balanced, and slightly airy in the balance switch. Goes from a clean all-rounder to a warm/bassy all-rounder. Great tech. Basically a cheaper Prestige LTD with more tuning options. "Endgame" for most people, but the case is SHIT. Jays Audio Youtube Channel
The Thieaudio Monarch MK IV presents two distinct tuning options, elevating its versatility. The balanced switch delivers a clean, smooth, and slightly airy presentation, offering a refined all-rounder sound that's very detailed, well-layered, and resolving – essentially a direct upgrade to predecessors like the Monarch MK3 and Top Pro, with slightly more treble detail and air. Conversely, the bass switch provides a significantly fuller, warmer low end with punchy, well-textured bass and a tamer upper midrange, addressing criticisms of thinness in earlier models and offering a specialized, engaging listen for bass-heavy genres.
Technically, the MK IV sits comfortably in the $1,000 tier, offering a slight bump in detail retrieval, refinement, and smoothness over the MK3 and MK2, comparable to the Dunu Glacier and Prestige LTD. While not a giant leap, the dual tuning options make it arguably a better all-rounder than single-tuning competitors; the balance switch excels with acoustic, classical, and cleaner genres, while the bass switch shines with rock, metal, R&B, and pop. Build quality is improved with an all-metal shell, though the flimsy cardboard case is a notable disappointment. Vocals are smooth, balanced, and enjoyable, though sets like the Monarch MK2, Mystic 8, RSV, or Arcanis offer more forwardness or unique character. Bass quality is excellent for most, though pure bass enthusiasts might prefer models like the Thieaudio Origin for its unique texture.
Ultimately, the Monarch MK IV is a highly compelling endgame option for the vast majority. It combines strong technical performance with exceptional versatility through its two excellent tunings, covering a wide genre spectrum effectively. While value-focused options like the Top Pro, Volare, or Mega5EST offer similar technicalities at lower prices, the MK IV's refinement, tuning flexibility, and slightly superior performance make it easy to recommend. It allows listeners to leave the hobby satisfied, provided they resonate with its sound – though chasing marginally better flagships involves steep diminishing returns. The king might be debatable, but the MK IV is undoubtedly a very solid $1,000 contender.
ThieAudio Monarch MK4 reviewed by: Jaytiss
9.8
Reviewer Score
Detailed fun, rich bass. It's hard to fault Jaytiss Youtube Channel
Priced between $1,150 and $1,300 depending on custom faceplate options like the butterfly design shown, the Thieaudio Monarch MK IV boasts exceptional build quality with a large but well-contoured titanium shell offering a secure and comfortable fit. Key features include the innovative rumble switch for adjustable bass levels on the fly, a durable two-pin connector, and a solid feel that inspires confidence in longevity. While the included accessories are considered fair but unexciting, the shell's customization potential and rugged construction are major highlights.
Sonically, the Monarch MK IV delivers a detailed, exciting, and clean sound signature that stands as the best in the Monarch lineage. The rumble switch provides two distinct profiles: the red switch (no rumble) offers a balanced, tactful bass presentation, while the gold switch (rumble) adds a satisfying sub-bass shelf ideal for genres like hip-hop. Treble performance is notably improved over the MK III, though a 10k peak requires careful ear tip selection for some listeners. It trades blows with flagships like the $3,000 Annihilator (better sub-bass focus) and the $1,800 Elysian Apostle (more vocal forward), often matching or exceeding their technicalities while offering its unique tuning flexibility.
Scoring a top-tier 9.8, the Monarch MK IV earns its place through a compelling combination of premium build, the highly functional rumble switch, and outstanding sound quality that feels both special and refined. While acknowledging the high price, it represents significant value against competitors like the $2,000 Thieaudio Valhalla or the fiddly Grand Maestro, offering a feature-rich, durable, and sonically excellent package that justifies its position as a current summit-fi favorite.
ThieAudio Monarch MK4 reviewed by: Tim Tuned
8
Reviewer Score
check links for more info: Tim Tuned Youtube Channel
ThieAudio Monarch MK4 reviewed by: Super* Review
7*
* score normalized
Kind of an impressive sound signature. A little bit dry in its bass presentation. Sounds a little bit clinical with its stock tuning. Maybe a bit too much bass in rumble mode. But it's kind of nice to have both tonalities in one IEM.Super* Review original ranking
Super* Review Youtube Channel
The ThieAudio Monarch MK4 presents a technically impressive but ultimately dry and clinical sound signature. Its stock tuning is described as clean and neutral with a meaty sub-bass boost, but it can come across as a bit thin and bodyless, leading to a preference for engaging its "rumble mode" tuning switch, which significantly thickens the low-end. However, its most significant drawback is its problematic fit for average-sized ears; the large, cumbersome shell tends to hang outside the ear, resulting in an unstable and annoying wearing experience that greatly detracts from its performance.
In stark contrast, the more expensive ThieAudio Valhalla is hailed as a genuinely impressive and wow-inducing flagship. Its all-balanced armature design delivers a warmer, more pleasant tonal balance compared to the Monarch MK4, with a bass presentation that is far more dynamic and satisfying despite the driver type. It excels in technical performance, offering superb imaging, separation, and a smooth yet lively treble that combines to create one of the most compelling listens in its class. While still a large IEM, its fit is markedly better than the Monarch's, though not perfect.
In direct comparisons, the Valhalla consistently ranked higher than the Monarch MK4 and competitors like the 64 Audio U4S and Dunu Glacier in categories like technicalities and overall personal preference. The Monarch MK4's combination of a sometimes clinical, sometimes overly thick sound and its poor fit results in a three-star rating. The Valhalla, despite its high cost, is so compelling it earns a four-star rating and is deemed a special IEM that actually justifies its flagship price for its exemplary sound, even if its physical ergonomics are not ideal.
ThieAudio Monarch MK4 reviewed by:
Fresh Reviews
9*
* The score of this reviewer influences only the Gaming Score
The ThieAudio Monarch MK4 is a premium IEM that earns a spot in the S-tier for competitive gaming, offering a significant upgrade over its predecessor and A-tier competitors. It features a unique rumble mode switch that adds a satisfying low-end punch and weight without muddying the detailed, reference-grade tuning of the standard mode. While the CNC aluminum build feels exceptional, the design is a bit bulky and heavy, which can lead to some comfort issues during very long, multi-hour sessions.
For gaming, the technical performance is nothing short of phenomenal. The imaging is holographic and the depth perception is absolutely exceptional, providing a critical advantage in tactical shooters like VALORANT where tracking footsteps through walls becomes incredibly precise. The wide and deep soundstage pushes sounds off the player, creating an immersive experience. While rumble mode is preferred for titles like Call of Duty, the standard mode's clean and detailed signature shines in battle royales like Apex Legends, though the 2-4k range can make gunfire a bit shouty at higher volumes.
This is also an absolutely amazing set for music, delivering an elevated level of technicality and resolution. The standard mode offers a fast, clean, and neutral listen with great detail retrieval, while the rumble mode provides a weightier, more engaging bass profile for tracks that benefit from the extra warmth and punch. Ultimately, it's a very high-end IEM that delivers a top-tier experience for both competitive gaming and critical music listening.
ThieAudio Monarch MK4 reviewed by: IEMRanking AI
9
Reviewer Score
The Thieaudio Monarch MK4 introduces a practical tuning switch, letting users flip between Standard for a neutral, detailed profile and Rumble for a pronounced 3dB sub-bass boost. This flexibility handles diverse genres well, though the thick-shelled aluminum build—while durable—may challenge those with smaller ears. While the modular cable works reliably, its brown "Chocolate" design clashes aesthetically with the IEMs, and the included case feels disappointingly flimsy for the price .
Sound-wise, Standard mode delivers clean mids and airy treble suited for acoustic or jazz, while Rumble mode adds visceral depth to electronic or hip-hop without overwhelming vocals. Technical performance impresses with a wide stage and sharp layering, though the diffuse imaging occasionally lacks density. While not the absolute pinnacle in resolution for its tier, the MK4’s tuning versatility makes it a compelling all-rounder—just don’t expect specialist-level vocal intimacy .
Dunu Glacier Reviews
Dunu Glacier reviewed by: Jays Audio
9
Reviewer Score
Clean, balanced sound, clear vocals, great midrange and tech, would rec if not for the unit variance in the tuning, the unit I got sounds different than the earlier ones which was bass-boosted diffuse field Jays Audio Youtube Channel
Dunu Glacier reviewed by: Gizaudio Axel
9
Reviewer Score
Reveals every detail in your music, both the good and the bad. Exceptional bass, ethereal treble, remarkable clarity, and outstanding detail. The upper mid-range might be a bit too much for some people.Gizaudio Axel original ranking
Gizaudio Axel Youtube Channel
Dunu Glacier reviewed by: Jaytiss
9.3
Reviewer Score
Upper mids kill it for me, but it's a fun set. Jaytiss Youtube Channel
Priced around $1,350, the Dunu Glacier is a premium nine-driver tribrid IEM featuring one dynamic driver, four balanced armatures, and four electrostatic drivers. The build quality is exceptional with a beautiful mirrored polished steel shell, though it's noted as a bit large, heavy, and a fingerprint magnet. Comfort is generally good, and it includes a high-quality, pliable cable with interchangeable connectors and a secure chin slider. Packaging is also highlighted as exceedingly well done, typical of Dunu's recent standards.
Sonically, the Glacier delivers a very bassy, extremely fun, and highly engaging V-shaped signature. The strong bass is balanced by prominent upper mids, offering good detail resolution and micro-details. However, a noticeable energy peak around 3kHz can make some tracks feel overly energetic, intimate, or even slightly shouty, limiting its versatility for mellower listening sessions. Comparisons place it near sets like the LETSHUOER Tera (less bass, cleaner) and ThieAudio Monarch MK I (less bass, more even upper mids), while noting it surpasses the Dunu Brain Dance (DK-31) in detail and bombast, though the Brain Dance offers significant value at half the price.
Ultimately, the Dunu Glacier stands out as a fantastic and unique IEM with satisfying bass weight, good imaging, and excellent micro-details. Its fun, bombastic character and high-quality build make it a compelling choice, but the specific upper-mid energy requires careful consideration. It earns a recommendation for those seeking an ultra-engaging Harman-style listen with top-tier driver tech, though demoing is advised due to its distinct tonal quirks.
Dunu Glacier reviewed by: Precogvision
7.2
Reviewer Score
Quite exciting and dynamic, possibly a bit bright in the treble. Precogvision Youtube Channel
Dunu Glacier reviewed by: Tim Tuned
7
Reviewer Score
Less thin harman with amazing tech Not very natural timbre Tim Tuned Youtube Channel
Dunu Glacier reviewed by: Super* Review
9*
* score normalized
Convinces me that the harman target can sound excellent.Super* Review original ranking
Super* Review Youtube Channel
The Dunu Glacier stands as the brand's latest flagship tribrid IEM, priced around $1,350. Its standout feature is its adherence to the Harman target curve, a rarity at this level, executed with notable success. The Glacier boasts exceptional build quality, featuring polished 904L stainless steel shells that feel substantial and genuinely premium, justifying its price tag aesthetically. It comes loaded with accessories, including a plethora of ear tips (like the Candy and new clear Dunu Lunnies) and a large carry case, though the case design is noted as slightly awkward. The included cable is thick, well-made, and features Dunu's signature swappable terminations (3.5mm and 4.4mm included), though its ear hooks are somewhat loose and the chin cinch doesn't hold perfectly.
Sonically, the Glacier delivers a contrasty, V-shaped signature true to Harman but avoids the thinness sometimes associated with that target, thanks to extra bass emphasis. The bass is a major highlight – big, impactful, deep, well-textured, and satisfyingly clean with zero bleed into the mids. The treble is forward yet remarkably smooth, avoiding sharpness or sibilance. While technically proficient with good imaging and a strong sense of depth (especially from the bass), it leans slightly more towards contrast than nuanced micro-detail, particularly in the mid-range. Compared to rivals like the 64 Audio U4s (more mid-focused, warmer, laid-back) and the Dunu Mirai (brighter, most mid-focused, wider stage but less satisfying bass and slightly digital/scratchier treble), the Glacier excels in bass impact and separation, smoothness, and depth perception, while the others might appeal more for pure mid-range focus.
Overall, the Dunu Glacier is a highly refined IEM with no glaring weaknesses. Its excellent build, satisfying Harman-tuned sound (especially the standout bass and smooth treble), and competitive technicalities make it a compelling option in the flagship tier. While its weight and aggressive shell molding might cause minor comfort issues when lying down, and the ear hooks could be tighter, it earns a very solid four-star rating for delivering a premium experience that largely justifies its cost and successfully champions the Harman target.
Dunu Glacier reviewed by: Z-Reviews
10
* score normalized
The Dunu Glacier delivers an extraordinary premium experience right from the unboxing, featuring a lavish presentation, a massive high-quality fabric cable with interchangeable terminations, and hand-polished stainless steel earpieces that feel substantial and expensive. Despite the controversial MMCX connectors, the cable and fit are praised, complemented by a ton of accessories including multiple ear tip types, a leather case, and even a brush. This is Dunu’s flagship effort at $1300, and the physical presentation screams luxury.
Sonically, the Glacier is a revelation with a massive, immersive soundstage that places instruments at a distance, creating a surround-like experience rather than an in-your-head assault. The tuning is remarkably relaxed and natural, prioritizing smoothness and spatial depth over aggression. Tracks with atmospheric elements or live recordings become breathtaking, revealing layers of echo and venue acoustics that feel expansive and holographic. This isn’t hyper-detailed or clinical; it’s chill, luxurious, and emotionally resonant, making even familiar music feel newly captivating.
Compared to competitors like the Thieaudio Prestige Limited or Monarch MkIII, the Glacier carves its own niche with its unparalleled sense of space and effortless presentation. It doesn’t compete on technical aggression but instead offers a transportive, almost spiritual listening experience. If you crave an endgame IEM that emphasizes grandeur, natural tonality, and pure musical immersion over analytical prowess, the Glacier is a jaw-dropping contender. Just be prepared for its unique, room-filling signature—it’s less an in-ear monitor and more a portal.
Dunu Glacier reviewed by: IEMRanking AI
9
Reviewer Score
The Dunu Glacier delivers a technically impressive listening experience with its nine-driver tribrid setup (1DD+4BA+4EST). The stainless steel shells feel substantial yet remain comfortable for extended sessions despite their weight. Sonically, it presents a Harman-inspired tuning enhanced by significant sub-bass rumble and a notably wide soundstage, creating an expansive presentation.
Bass response is a standout, offering deep, textured rumble and strong physical impact thanks to the biocellulose dynamic driver, while the four EST drivers provide highly detailed treble without harshness. However, the upper mids can occasionally feel intense or forward on certain tracks, and the midrange sometimes exhibits a slight hollowness, making it less forgiving of poor recordings. While the soundstage width is exceptional under $2000, depth and layering don’t quite reach the absolute top tier.
At $1349, the Glacier justifies its price with a premium unboxing experience, including a versatile modular cable, multiple high-quality eartip options (Dunu S&S, Candy, SpinFit), and a distinctive design. It’s a strong choice for those seeking a dynamic, detailed signature with thunderous bass and a vast stage, though its revealing nature and shell size may not suit all listeners or genres.
ThieAudio Monarch MK4 User Reviews
Impressive sound experience and the built quality is finally worth the price (compared to Mk3). I "upgraded" my Mk3 and I am happy with it.
Pros
I don't regret buying those. I would not describe them as a huge upgrade to the Mk3 in terms of sound, but it is noticeable. Built quality and overall experience much more premium than MK3.Cons
The designs of the shells are a matter of taste.Dunu Glacier User Reviews
Luxury looking IEM with great sound quality. Sounds best with Tangzu Sancai tips
Pros
Sounds fun and clean at the same time, very engaging. Insane soundstage and 3D-holographic effect.Cons
In some songs too energetic for long listening sessions.
Price: $1,349
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