Kiwi Ears Astral VS ThieAudio Monarch MK4

The Kiwi Ears Astral offers a solid build quality with comfortable shells that fit well, featuring a practical nozzle design that holds ear tips securely. The included cable is notably high-quality, featuring a functional chin slider, a sleek bluish-purplish-gray hue, and connectors that are exceptionally easy to swap. While the case is utilitarian and similar to other Kiwi Ears offerings, the overall package is practical and well-appointed.

Sonically, the Astral stands out as a special and highly competitive set at its $299 price point. It delivers a beautifully tuned, balanced tonality that hugs the target curve closely, offering a satisfying amount of bass, well-executed upper mids, and a generally pleasing, non-fatiguing sound. While it may occasionally lean slightly shouty or risk sounding dull on certain tracks compared to more aggressively tuned alternatives, it excels as a refined all-rounder. Its technical performance – including spaciousness, detail retrieval, and rich bass texturing – is impressive for the price, though micro-details and ultimate pristine clarity aren't class-leading.

The Astral trades blows with top competitors like the Performer 7 (slightly darker/richer) and the Volume S (better dynamics but less sub-bass), often coming out ahead for its cohesive balance. It significantly improves upon predecessors like the Kiwi Ears Quartet or Singolo, offering better upper-mid presence and technicalities. Ultimately, it represents a fantastic option for those seeking a well-tuned, balanced IEM, delivering a highly enjoyable and versatile listening experience with minimal faults. For its price, it's exceptionally hard to beat, earning strong marks across the board.

The Kiwi Ears Astral, priced at $299, combines one dynamic driver and six balanced armatures in an exceptionally ergonomic and lightweight 3D printed resin chassis. Comfort is phenomenal, allowing for extended listening sessions exceeding eight hours without discomfort. Available in striking blue or gold faceplates, the Astral impresses immediately with its build and feel.

Tonally, the Astral offers a fantastic, well-balanced V-shaped tuning. It features punchy, airy, and well-separated bass with notable sub-bass rumble that avoids muddying the exceptionally clear and resolving mids. The treble provides very good extension, feeling airy, technical, clean, and fast, contributing to an overall presentation that sounds more expensive than its price tag. While generally excellent, providing too much power can make the upper region slightly spicy with certain intense audio cues. The technical performance – imaging, separation, layering, and micro-detail retrieval – is phenomenal across various music genres.

For competitive gaming, the Astral truly shines, demonstrating holographic imaging and precise depth perception. In Valorant, it excels at differentiating multiple footsteps and gunfire sources with urgency and precise horizontal and vertical placement. It handles chaotic moments in CS2, Apex Legends, and Call of Duty exceptionally well, maintaining clear separation during intense firefights, grenade explosions, and air strikes without becoming fatiguing or overwhelming. Tip selection is crucial for optimal performance, with recommendations leaning towards options like the Azla EarFit Light. Despite including a decent interchangeable cable and silicone tips, third-party tips are suggested. Ultimately, the Kiwi Ears Astral is a fantastic all-rounder, delivering top-tier performance for both music and competitive gaming at its mid-range price point.

Priced at $300, the Kiwi Ears Astral stands as the brand's most expensive IEM, featuring a 10mm dynamic driver and six balanced armatures. The build is notably large and deep, with a design described as "pepper" yellow or more appealing "blue crystal" – though the included accessories are minimal, offering just one set of tips, replacement filters, and an interchangeable connector (3.5mm or 4.4mm). The gunmetal gray four-wire cable earns praise for its quality and flexibility, but the deep connector adds significant length, potentially hindering portability. Simply put, at this price with so little included, the sound must deliver.

And deliver it does. The Astral produces an exceptionally wide and holographic soundstage, achieving impressive "instrument realization" – creating an almost unsettling sense of space where sounds can emerge from above, below, behind, or beside the listener. The tuning is decidedly chill and smooth, prioritizing effortless listening over aggressive detail. The dynamic driver handles frequencies up to 300Hz, providing satisfying warmth and weight to the bass, while the six BAs contribute significantly to the expansive staging and air. This isn't a sound easily found in sub-$100 IEMs; it offers a unique, relaxed presentation reminiscent of far more expensive models, like certain $1,500 Final Audio IEMs known for holographic imaging.

The Kiwi Ears Astral emerges as a strong contender for favorite IEM of the year. While it lacks accessories and its large, somewhat plain design might not win beauty contests, its unique sonic character justifies the $300 price tag. It carves out a niche as a "big wide smooth" option, perfect for extended, fatigue-free listening sessions where the goal is pure enjoyment and astonishment rather than analytical treble scrutiny. It competes favorably with $500+ IEMs known for soundstage, offering a glorious, spacious, and utterly engaging listening experience that makes revisiting tracks a joy. For those seeking a high-end, chill sound with exceptional staging and bass foundation, the Astral is a magnum opus worth serious consideration.

The Kiwi Ears Astral presents a well-rounded, balanced sound signature characterized by a boost in sub-bass and treble air, sharing some DNA with the Meta but offering significant improvements. It delivers a punchier, harder-slamming low end with better texture, making drums feel livelier and more impactful compared to the Meta. The mid-range and vocals are also more forward and less relaxed, creating a fuller sound versus the Meta's brighter, leaner presentation that highlights treble sparkle. While not vocal-centric like the Arcanis, the Astral excels as a true all-rounder.

Technically, the Astral edges out the Meta, offering better bass texture, improved vocal clarity, and slightly more micro-details in the mid-range and treble. Its value is strong at roughly $50 more than the Meta. However, the boosted air region can make the treble sound slightly wispy or fatiguing at higher volumes on very energetic tracks laden with symbols or air, making it best suited for mid-volume listening (around 65 dB). Genre-wise, it shines as an all-rounder at this volume, providing clean, extended, natural vocals, a thumpy low end with good rumble, and extended, airy treble. Compared to the Odyssey, the Astral is cleaner, more detailed, smoother, and airier, working better for mid-centric genres like indie, acoustic, and classical, though the Odyssey scales better at higher volumes and feels fuller for pop, metal, R&B, and hip-hop.

Positioned as a strong contender for the best all-rounder under $300, the Astral is seen as a more complete version of sets like the Pilgrim and Dusk, offering better sub-bass extension, texture, and rumble with less shouty vocals and sizzly treble. It significantly outperforms the Performer 5+2 technically for only $50 more and is a tier above the Kiwi Ears KE4 in clarity and technicalities. While specific alternatives like the EPZ P50, Tanchjim Origin, or Cadenza 4 are better for vocal focus, and sets like the Estrella or Deuce excel for bass, the Astral stands out for its balanced, engaging, and technically proficient performance across most genres at mid-volume. Expecting potential sales around $260, it's heralded as the new all-rounder benchmark under $300, ideal for listeners who want a single versatile IEM where "everything just sounds great."

Unboxing & build land solidly for the price: a genuinely pocketable zip case, three pairs of narrow-bore tips, spare nozzle filters, and a modular 3.5/4.4 cable with a secure push-pull lock. The four-wire cable is soft, low-memory, and only lightly microphonic at the slider. Resin shells are a bit chunky with a short metal nozzle (6.0 mm at the widest) and average isolation, but the seal is stable and the comfort is excellent for long sessions—just not ideal for sleeping due to the slight protrusion.

Tonally, Astral aims for a Meta-style tuning with extra upper-treble air: clean, detailed, and engaging. The bass is sub-bass focused—tight, textured, never boomy—with punchy but restrained mid-bass; quality over quantity, delivering standout rumble and definition (A+ bass quality). Mids are the highlight: clean, forward vocals with natural timbre and strong separation. Lower treble adds clarity without sibilance, while the elevated upper air brings sparkle and space; it can read a touch crisp for sensitive listeners, especially on bright masters or at high volume.

Technicalities impress: excellent imaging, open width, and resolution that surfaces micro-details and locks centers convincingly. Versus Kiwi Ears K4, Astral trades K4’s warmer, fuller mid-bass for tighter bass, clearer vocals, and more air; versus Xenns Tea Pro, Astral offers better bass texture and cleaner, more forward vocals; against ZiiGaat Odyssey, Astral is the more resolving and airy set, while Odyssey feels fuller and more relaxed with tamer upper treble. Recommended for those wanting a detailed all-rounder, Meta-leaning balance, forward mids, and textured sub-bass; not for upper-treble-sensitive listeners or those craving heavy mid-bass and warmth. Final verdict: 4/5, competitive and confidently recommended at its price.

The Kiwi Ears Astral arrives in a package typical for the brand, featuring a resin shell and a metal nozzle. While the design isn't groundbreaking, the build feels sturdy. The included cable is a pleasant surprise, better than expected and features interchangeable terminations. A major highlight is the inclusion of Sancai ear tips, considered valuable accessories at this price point. However, the fit presents some challenges: the shells are notably bulky and chunky, pushing comfort limits for larger ears, and the angled cable hooks can cause sealing issues, though switching to larger tips helps significantly.

Sonically, the Astral delivers a solid bass and mid-range balance. Yet, the standout issue is the treble presentation. It's perceived as quite forward and adds a noticeable digital edginess to the timbre, making details sound overly prominent and somewhat unnatural. While technical performance seems improved over models like the original Wan'er, this treble character overshadows the positives. Initial impressions suggest it falls short of previous Kiwi Ears releases like the Quartet or Singolo, with even the Lush potentially being preferred. The Sancai tips and overall package offer good value, but the tuning needs refinement.

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.