ThieAudio Monarch MK4 VS CrinEar Daybreak

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.

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.

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.

Monarch MK IV lands as a top-three set, sitting just behind the PMG APXSE and CP622B, and it earns that spot with an evolutionary design: a single, tactile rumble switch that can be flipped while the IEM is in-ear—no fiddly pins, no tools. In stock (red) mode it’s a vocal-friendly tuning with restrained mid-bass; engage the switch and the low end lifts, adding note weight without smearing the mids. The shell is metal, build is tight, and all the BAs are Sonion, signaling premium parts and execution.

Low-end performance nails both 808 drops and classic rock kick drums (“When the Levee Breaks”) with satisfying slam—better with the switch on—while bass guitar texture (pulls, plucks, string ring) stays articulate into the lower treble. Vocals are clean in stock mode and gain a pleasing husk and density with rumble engaged, making artists like Neil Young and Mark Knopfler pop. Upper mids/treble avoid glare and long-term fatigue, turning this into a true “sofa set” for hours-long sessions.

At $1,400 it competes shockingly well against far pricier summit-fi gear—no veil, no masking, just balanced resolution and a flip-to-taste bass shelf. Compared to Valhalla, the MK IV’s instant two-flavor flexibility pushes it ahead on value; bone-conduction curios like Origin feel more niche by contrast. Net: the best ThieAudio to date, an easy recommendation, and likely the new #3 overall—thanks to that simple, game-changing rumble switch that future proofs the tuning.

ThieAudio Monarch MK4 comes in at $1,150 with a tribrid array—2 DD + 6 BA + 2 EST—a chunky stock cable with friction-fit swappable terminations, and a genuinely excellent, in-ear-operable “Rumble” bass switch. The new metal shells look tidy, but the fit is very large; on average ears it tends to sit a bit out of the concha and feel unstable (seal is doable, comfort is mediocre). Build details like the firm chin slider are nice, yet the cable bulk and loose termination retention detract from daily use.

Tonally, stock MK4 aims for a clean-neutral presentation with a meaty, sub-bass-focused lift, lively upper registers, and excellent extension. The flip side is a slightly dry / clinical character with a hint of treble hardness that can leave notes feeling a bit bodyless. Engaging Rumble mode thickens the curve from ~300 Hz down—more warmth and weight, bordering on “gigabass” territory—making the set fuller and more fun, though arguably too bassy for purists. Staging and imaging are solid, and resolution is high, but macro-dynamics land behind peers; compared side-by-side, sets like Dunu Glacier and 64 Audio U4S feel punchier, while Valhalla sounds warmer, smoother, and more effortlessly resolving.

Overall, MK4 is a technically capable tribrid with two distinct tunings on tap—clinical-clean stock and warmed-up Rumble—but it’s held back by fit size, cable quirks, and that slightly wooden bass texture. For listeners chasing a bright-leaning neutral with legit sub-bass reach (and who can accommodate a big shell), it’s a compelling try; in this lineup, though, it settles at a three-star recommendation next to more engaging or comfortable alternatives.

The CrinEar Daybreak lands at $170 as the second IEM from Crinacle, positioned as a more accessible follow-up to the limited-edition Meta. This tribrid features a single dynamic driver, two balanced armatures, and two micro planars handling the highs. The build includes compact, semi-custom dark smoky resin shells offering good stability and comfort, though the molding might be slightly aggressive for some. The included cable provides swappable terminations (3.5mm and 4.4mm) but is noted for being somewhat stiff and kink-prone. Accessories are solid for the price, including a leatherette case and multiple tip options, with the stock silicones recommended for optimal fit due to the slightly longer nozzle.

Sonically, the Daybreak delivers what the review calls the best tonal balance yet within the popular "new meta" tuning category. Its frequency response is described as exceptionally neutral and natural from the mid-bass upwards, creating a low-contrast, chill, and non-fatiguing listen with forward, textured vocals and non-existent sibilance. However, this comes with trade-offs: the bass lacks ultimate tightness and slam, and the treble exhibits a light, wispy quality (likened to cotton candy) that lacks some bite and definition. While technical performance like imaging is solid, it doesn't stand out as exceptional.

In direct comparisons with six competitors around $200 (including the Meta, Binary x Chopin, EPZ P50, Ziigaat Lush, Truthear Pure, and Kiwi Ears KE4), the Daybreak consistently ranked highest for tonality. It was praised as a modern benchmark for natural tuning at its price. However, it fell behind in bass physicality and treble incisiveness. Ultimately rated a strong four stars, the Daybreak is highlighted as an excellent choice for those prioritizing a refined, natural midrange and easy listening experience over sheer technical prowess or visceral impact, earning the label of a "modern-day Etymotic ER2XR" with far better comfort.

The CrinEar Daybreak features a metal nozzle and metal faceplate with comfortable contours, though the fit is noted as a bit dainty and small. Isolation is practically non-existent, and the fit isn't particularly secure. The included cable looks nice and photographs well, featuring interchangeable terminations for versatility, but its chin slider moves too easily and isn't recommended for those needing a functional one. The case is deemed aesthetically pleasing and feels good, though not especially premium, magnetically shutting with adequate space.

Sonically, the Daybreak leans boring and somewhat sterile or dry. It offers nice bass and a lot of upper mids, which are done decently with a standard 3K peak. However, the combination of this upper-mid focus and an incisive peak around 8K contributes to a perceived harshness and sharpness, lacking in overall detail retrieval. Graph comparisons reveal its signature has significantly more upper mids and often more bass than competitors like the Moondrop Dusk or TruthEar Nova, resulting in a less engaging listen. Sets like the Defiant, Chopin, and Performer 7 are cited as more engaging alternatives at similar or lower prices, with the Defiant specifically recommended over the Daybreak. Even the Punch Audio martillo and Moondrop Meteor, sharing driver configurations, are considered more fun or better tuned.

Ultimately, the Daybreak is a solid A-minus IEM, well-packaged and a commendable first effort for the brand, but it's not hypeworthy or a benchmark. It lacks imagination and falls short against numerous compelling alternatives around its price point, such as the Performer 7, ZOS Defiant, Chopin, or discounted planar options like the Aether. While a good value, especially if found on sale via Linsoul or the used market, its piercing upper mids and failure to truly excel make it hard to fully recommend over the competition.

The CrinEar Daybreak offers a balanced, clean, and non-fatiguing sound signature, functioning effectively as an all-rounder. Every frequency region is solid, delivering a smooth presentation without harshness or overwhelming warmth. The bass provides a slight sub-bass rumble and integrates cleanly into the mids, avoiding bleed, though it lacks significant impact, slam, or deep texture. Similarly, the mid-range and vocals are well-separated and forward enough, free from congestion or odd timbre, but don't specialize. The treble has enough extension and air, avoiding darkness or excessive sharpness, but misses out on micro-detail, sparkle, and expansive staging. It’s a decent, inoffensive performer across the board, described aptly as a "very good vanilla ice cream cone".

Technically, the Daybreak is competitive but not class-leading. Sets like the Meta, Ziigaat Crescent, Kiwi Ears Astral, Simgot EM6L, or TruthEar Nova offer slightly better detail retrieval, imaging, and resolution. Its main challenge comes from remarkably similar competitors, particularly the EPZ P50 and SLIIVO SL224, which share nearly identical tuning, driver configurations, and technical performance around the same $160-$180 price point. The P50 leans slightly more vocal-centric, while the SL224 offers marginally better bass texture and treble detail (though costing more). If you already own either, the Daybreak becomes largely redundant. Against alternatives like the bassier, more dynamic Ziigaat Odyssey ($200), the Daybreak feels safer but less engaging at higher volumes. Compared to Harman-tuned sets like the Supermix 4, Chopin, or Nova, the Daybreak boasts fuller tonality and less fatigue but gives up some layering and detail.

Ultimately, the Daybreak is a competent, well-packaged all-rounder at $170, delivering a balanced and inoffensive listen suitable for any genre library. However, it fails to stand out uniquely in a crowded field. Its sound signature is replicated almost exactly by the existing P50 and SL224. While it earns a half recommendation as a solid option for those seeking a non-fatiguing all-rounder who *don't* own those twins, it's unlikely to become a favorite due to its lack of distinctive character. Value is decent, but alternatives offer more specialization or technical prowess for similar or lower cost.

The Crinacle Daybreak is a technically excellent IEM that offers exceptional clarity and detail retrieval without being fatiguing. Its five-driver configuration delivers a cohesive and precise sound signature that is clean, flat, and incredibly balanced. The bass is present and punchy but never exaggerated, making it a perfect tool for studying music and hearing every nuance in a recording.

However, this precision comes at the cost of fun. The tuning is described as a little dry and somewhat intimate, lacking the expansive soundstage and flavorful character that makes other IEMs more engaging for pure enjoyment. While the build is solid with an acceptable cable and nice connectors, its looks are admittedly boring. It’s a perfectly cooked meal that follows the recipe without any surprises.

Ultimately, the Daybreak is a highly respected and much-loved IEM that fills a specific niche for a clean, reference-like sound. It’s a business suit of an IEM, but it wouldn't be the first choice for someone looking for a more exciting, fun, or "f***ed up" sound signature to get them moving. It commands respect for its technical merits, even if it isn't to everyone's personal taste.