Thieaudio Monarch Mk2 and Symphonium Helios use 1DD+6BA+2EST and 4BA driver setups respectively. Thieaudio Monarch Mk2 costs $1,000 while Symphonium Helios costs $1,100. Symphonium Helios is $100 more expensive. Thieaudio Monarch Mk2 holds a slight 0.1-point edge in reviewer scores (8 vs 7.9). Thieaudio Monarch Mk2 has better mids with a 0.5-point edge, Symphonium Helios has significantly better treble with a 1.1-point edge, Symphonium Helios has significantly better dynamics with a 1-point edge, Symphonium Helios has better details with a 0.5-point edge and Symphonium Helios has slightly better imaging with a 0.4-point edge.
Insights
Metric | Thieaudio Monarch Mk2 | Symphonium Helios |
---|---|---|
Bass | 6.8 | 7 |
Mids | 8.4 | 7.9 |
Treble | 7.5 | 8.6 |
Details | 7.6 | 8.1 |
Soundstage | 8 | 8 |
Imaging | 7.4 | 7.8 |
Dynamics | 6.5 | 7.5 |
Tonality | 8 | 7.8 |
Technicalities | 7.8 | 7.8 |
Thieaudio Monarch Mk2 Aggregated Review Score
Average Reviewer Scores
Symphonium Helios Aggregated Review Score
Average Reviewer Scores
Thieaudio Monarch Mk2 Details
Driver Configuration: 1DD+6BA+2EST
Tuning Type: bass-boosted neutral
Brand: ThieAudio Top ThieAudio IEMs
Price (Msrp): $1,000
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Symphonium Helios Details
Driver Configuration: 4BA
Tuning Type: bass-boosted neutral
Brand: Symphonium Top Symphonium IEMs
Price (Msrp): $1,100
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Thieaudio Monarch Mk2 User Review Score
Average User Scores
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Symphonium Helios User Review Score
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Thieaudio Monarch Mk2 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+Symphonium 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 Mk2 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
A- Good technical performance. Clear separation and decent detail retrieval across various tracks. Soundstage shows reasonable width and depth.
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.
Thieaudio Monarch Mk2 Reviews
Neutral tuning with one of the clearest mid-ranges. Natural and clean vocals. Great resolution, separation, and detail. Can be a little dry with its analytical presentation. Bass is well-seperated from other instruments, but nothing special especially at $1K. Would've liked more depth, and treble is also a bit unstable and dips, resulting in a lack of air/depth. Mid-bass is just enough for my library, but would've liked more for genres like hiphop and rock. Cable is heavy, and fit may be too big for many (need to shove in deep). Jays Audio Youtube Channel
Too much unit variation to recommend to others highly. Jaytiss Youtube Channel
Outstanding tuning. Smooth, balanced tuning with natural vocals, beautiful timbre, and excellent tonality. Detail and could use more bass. Treble depends on ear tips.Gizaudio Axel original ranking
Gizaudio Axel Youtube Channel
Organic midrange Wooly bass response and less prominent treble may not work best for certain genres
Good treble with tons of air. Forward, ethereal mids. Good detail retrieval with tons of microdetails. Lackluster mid-bass.
Cohesive, smooth, balanced, technical slight treble wispiness Tim Tuned Youtube Channel
11/10 mid-range. Mid-bass could use more texture and stage depth could be better. Yap, that's all. Oh and the fit - I'm blessed, but you may not be.
A solid improvement in imaging with slightly more palatable tonality than its predecessor. Precogvision Youtube Channel
Symphonium Helios Reviews
Clean-sounding monitor with great bass decay Occasional splashy cymbals due to the treble extension
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.
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.
Great technicalities. Lacking that last leg of refinement in terms of coherency. Precogvision Youtube Channel
check links for more info: Crin Youtube Channel
Thieaudio Monarch Mk2 User Reviews
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