Thieaudio Monarch MK3 VS Symphonium Helios
IEM Comparison: Expert & Community Scores Side-by-Side
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Thieaudio Monarch MK3 and Symphonium Helios use 2DD+6BA+2EST and 4BA driver setups respectively. Thieaudio Monarch MK3 costs $1,000 while Symphonium Helios costs $1,100. Symphonium Helios is $100 more expensive. Thieaudio Monarch MK3 holds a slight 0.3-point edge in reviewer scores (8.1 vs 7.9). Thieaudio Monarch MK3 carries a user score of 6.8. Thieaudio Monarch MK3 has better bass with a 0.5-point edge, Symphonium Helios has better treble with a 0.7-point edge, Thieaudio Monarch MK3 has better soundstage with a 0.5-point edge, Symphonium Helios has slightly better details with a 0.4-point edge and Symphonium Helios has slightly better imaging with a 0.4-point edge.
Insights
| Metric | Thieaudio Monarch MK3 | Symphonium Helios |
|---|---|---|
| Bass | 7.5 | 7 |
| Mids | 7.8 | 7.9 |
| Treble | 7.9 | 8.6 |
| Details | 7.8 | 8.1 |
| Soundstage | 8.5 | 8 |
| Imaging | 7.4 | 7.8 |
| Dynamics | 7.7 | 7.5 |
| Gaming capabilities | 7.6 | 6.8 |
Thieaudio Monarch MK3 Aggregated Review Score
Thieaudio Monarch MK3 Average Reviewer Scores
Symphonium Helios Aggregated Review Score
Symphonium Helios Average Reviewer Scores
Thieaudio Monarch MK3 Details
Driver Configuration: 2DD+6BA+2EST
Tuning Type: U-Shaped
Price (Msrp): $1,000
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Symphonium Helios Details
Driver Configuration: 4BA
Tuning Type: bass-boosted neutral
Price (Msrp): $1,100
Support our free service! Buying through our affiliate links costs you nothing extra:
Thieaudio Monarch MK3 User Review Score
Thieaudio Monarch MK3 Average User Scores
Average User Score:
Based on 1 user reviews
6.8Cautiously Favorable
Symphonium Helios User Review Score
Symphonium Helios 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 MK3 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
ASymphonium Helios Gaming Score
Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
6.8Gaming Grade
B+Thieaudio Monarch MK3 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 across various tracks. Soundstage shows reasonable width and depth.
Bass
A
Strong, well-defined bass with good texture. Delivers satisfying punch and rumble without overwhelming other frequencies.
Mids
A
Excellent midrange with natural timbre and great detail retrieval. Vocals are forward and emotive with lifelike instrument reproduction.
Treble
A
Excellent treble: airy, extended and well-controlled. Great micro-detail retrieval without sibilance or harshness.
Dynamics
A
Excellent dynamics with great contrast and speed. Transients are crisp and micro-details are clearly articulated.
Soundstage
S-
Exceptional soundstage with holographic imaging. Creates a truly three-dimensional space where instruments float naturally around you.
Details
A
Excellent detail retrieval: highly resolving without being clinical. Effortlessly reveals micro-details and textural subtleties.
Imaging
A-
Excellent imaging: precise and stable placement. Instruments occupy specific points in space with tangible positions.
Gaming
A
Clear spatial presentation handles directional cues effectively. Distinguishes key gameplay sounds while maintaining decent immersion. Bad value-to-cost for gaming purpose - not recommended
Symphonium Helios 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 across various tracks. Soundstage shows reasonable width and depth.
Bass
A-
Strong, well-defined bass with good texture. Delivers satisfying punch and rumble without overwhelming other frequencies.
Mids
A
Excellent midrange with natural timbre and great detail retrieval. Vocals are forward and emotive with lifelike instrument reproduction.
Treble
S-
Superb treble: effortless extension with crystal clarity. Perfect balance of sparkle and smoothness with exceptional detail.
Dynamics
A
Excellent dynamics with great contrast and speed. Transients are crisp and micro-details are clearly articulated.
Soundstage
A+
Exceptional soundstage with holographic imaging. Creates a truly three-dimensional space where instruments float naturally around you.
Details
A+
Exceptional resolution that uncovers the deepest layers. Retrieves even the most minute details while maintaining natural timbre.
Imaging
A
Excellent imaging: precise and stable placement. Instruments occupy specific points in space with tangible positions.
Gaming
B+
Respectable environmental presentation favors atmosphere over precision. Detects obvious directional cues while conveying game world ambiance. Bad value-to-cost for gaming purpose - not recommended
Thieaudio Monarch MK3 Reviews
Thieaudio Monarch MK3 reviewed by: Tim Tuned
2025-08-14
7.5
Reviewer Score
A
Tuning
S
Tech
MK2 but more fun and more V-shape Not as natural in timbre Tim Tuned Youtube Channel
Bass: A+
Mids: A+
Treble: A+
Thieaudio Monarch MK3 reviewed by:
Fresh Reviews
7*
* The score of this reviewer influences only the Gaming Score
Thieaudio Monarch MK3 reviewed by: Z-Reviews
10
* score normalized
Thieaudio Monarch MK3 reviewed by: Smirk Audio
7.9
Reviewer Score
A
Tuning
A+
Tech
Elevated, well-textured mid-bass. Pleasant mids. Elevated upper-treble may be pesky to some.
Bass: A+
Mids: A+
Treble: A
Dynamics: A+
Details: A+
Imaging: A+
Thieaudio Monarch MK3 reviewed by: Jays Audio
8.5
Reviewer Score
S
Tuning
S-
Tech
Better low-end texture and overall more engaging than MK2, but lacks the mid-range/vocal magic, so depending on your preference either is great. Still TOTL tech like MK2. Great all-rounder. Jays Audio Youtube Channel
Thieaudio Monarch MK3 reviewed by: Precogvision
7.3
Reviewer Score
A-
Tuning
A-
Tech
Still perplexingly poor bass performance, but improves upon the Monarch MKII's treble extension noticeably. Precogvision Youtube Channel
Bass: B
Mids: A+
Treble: A+
Dynamics: B
Details: A+
Imaging: A-
Thieaudio Monarch MK3 reviewed by: Gizaudio Axel
8
Reviewer Score
A
Tuning
A+
Tech
I prefer the Monarch MK II for its tonality, vocals, and timbre, but I get why some prefer the MK III. More bass, treble, and detail than the Monarch MK II. The vocal magic of the Monarch MK II is gone.Gizaudio Axel original ranking
Gizaudio Axel Youtube Channel
Thieaudio Monarch MK3 reviewed by: Jaytiss
8.5
Reviewer Score
S-
Tuning
A+
Tech
Fatiging at times for me, too fun at times. Jaytiss Youtube Channel
Mids: A+
Treble: A+
Dynamics: S
Soundstage: S
Thieaudio Monarch MK3 reviewed by: Shuwa-T
8.2
Reviewer Score
A+
Tuning
A+
Tech
Better bass response compared to the mk2 Trades off the lush midrange in place of a cleaner sounding, almost boring midrange
Bass: S-
Mids: A+
Treble: A+
Soundstage: A+
Details: A+
Imaging: S-
Thieaudio Monarch MK3 reviewed by: Nymz
7.1
Reviewer Score
A-
Tuning
B+
Tech
An improvement in the bass and treble department over the Mk2, but without the same special sauce in the mid-range and with some imaging problems still.
Bass: A-
Mids: A-
Treble: A+
Details: A-
Imaging: B
Symphonium Helios Reviews
Symphonium Helios reviewed by: Z-Reviews
8
* score normalized
Symphonium Helios reviewed by: Smirk Audio
7.9
Reviewer Score
A
Tuning
A+
Tech
Exceptional treble with solid bass. Great techs. Some may find the midrange a bit clinical. Fit will be a dealbreaker to some. Cons: Poor fit.
Bass: A
Mids: A
Treble: S-
Dynamics: A+
Details: A+
Imaging: A+
Symphonium Helios reviewed by: Precogvision
7.7
Reviewer Score
A
Tuning
A-
Tech
Great technicalities. Lacking that last leg of refinement in terms of coherency. Precogvision Youtube Channel
Bass: A-
Mids: A+
Treble: A+
Dynamics: A-
Details: A+
Imaging: A-
Symphonium Helios reviewed by: Crin
7.5
Reviewer Score
A
Tuning
A
Tech
check links for more info: Crin Youtube Channel
Symphonium Helios reviewed by: Shuwa-T
8.1
Reviewer Score
A+
Tuning
A+
Tech
Clean-sounding monitor with great bass decay Occasional splashy cymbals due to the treble extension
Bass: A
Mids: A+
Treble: S-
Soundstage: A+
Details: S-
Imaging: A+
Symphonium Helios reviewed by: Nymz
7.9
Reviewer Score
A
Tuning
A+
Tech
Top tier clarity and great technicalities, other than a hint of BA timbre plasticness to it. Mid-bass recession is the con in the tuning, turning it into a dry IEM. Top performer nonetheless.
Bass: B
Mids: A+
Treble: S
Details: A+
Imaging: A+
Thieaudio Monarch MK3 User Reviews
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Makavelian
2025-06-16 05:54:55
If this is what 'fun' sounds like, I ain't about it.
Pros
Detail retrievalCons
Recessed mids and odd timbre.Symphonium Helios User Reviews
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