ThieAudio Monarch MK4 VS Symphonium Helios SE
Aggregated Scores from Top Experts & Community
ThieAudio Monarch MK4 Aggregated Review Score
ThieAudio Monarch MK4 Average Reviewer Scores
Average Reviewer Score:
8.6Very Positive
Symphonium Helios SE Aggregated Review Score
Symphonium Helios SE Average Reviewer Scores
Average Reviewer Score:
8Very Positive
ThieAudio Monarch MK4 Details
Driver Configuration: 2DD+6BA+2EST
Tuning Type: Harman with bass switch
Price (Msrp): $1,149
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Symphonium Helios SE Details
Driver Configuration: 4BA
Tuning Type: n/a
Price (Msrp): $1,150
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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
Symphonium Helios SE User Review Score
Symphonium Helios SE Average User Scores
Average User Score: n/a
Based on 0 user reviews
No user reviews yet. Be the first one who writes a review!
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
SSymphonium Helios SE Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
6.9Gaming Grade
B+ThieAudio 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.
Symphonium Helios SE Scorings
Average Technical & Tuning Grades
Average Tunign Grade
A- Well-executed tonal character. No major flaws with good technical control. Smooth presentation works with multiple genres.
Average Technical Grade
A- Good technical performance. Clear separation and decent detail retrieval in most tracks. Soundstage has reasonable width and depth. Handles moderate complexity without congestion.
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 .
Symphonium Helios SE Reviews
Symphonium Helios SE reviewed by: Jays Audio
8.5
Reviewer Score
Best Treble around it's price. Super airy but still smooth. Bass-scoop isn't as bad as I thought, but those who want mid-bass - avoid it. Jays Audio Youtube Channel
Symphonium Helios SE reviewed by: Precogvision
7.4
Reviewer Score
See Helios but with more mid-treble and mid-bass. Precogvision Youtube Channel
Symphonium Helios SE reviewed by: Nymz
8.1
Reviewer Score
Limited to 50 units. A huge improvement fit wise versus the original. Great TOTL all-rounder. Great sub, upper mids and treble. Mid-bass is an improvement but still not boosted. Great technical chops while fixing the sense of plasticness the original had.
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.Symphonium Helios SE User Reviews
"This is an example review"
Pros
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Cons
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