Symphonium Helios and Letshuoer Mystic 8 use 4BA and 8BA driver setups respectively. Symphonium Helios costs $1,100 while Letshuoer Mystic 8 costs $1,000. Symphonium Helios is $100 more expensive. Letshuoer Mystic 8 holds a clear 0.6-point edge in reviewer scores (7.9 vs 8.4). Symphonium Helios has slightly better treble with a 0.4-point edge, Symphonium Helios has significantly better dynamics with a 1-point edge, Letshuoer Mystic 8 has better soundstage with a 0.5-point edge and Letshuoer Mystic 8 has slightly better imaging with a 0.3-point edge.
Insights
Metric | Symphonium Helios | Letshuoer Mystic 8 |
---|---|---|
Bass | 7 | 6.8 |
Mids | 7.9 | 7.9 |
Treble | 8.6 | 8.3 |
Details | 8.1 | 8 |
Soundstage | 8 | 8.5 |
Imaging | 7.8 | 8 |
Dynamics | 7.5 | 6.5 |
Tonality | 7.8 | 7.8 |
Technicalities | 7.8 | 8.2 |
Symphonium Helios Aggregated Review Score
Average Reviewer Scores
Letshuoer Mystic 8 Aggregated Review Score
Average Reviewer Scores
Symphonium Helios Details
Driver Configuration: 4BA
Tuning Type: bass-boosted neutral
Brand: Symphonium Top Symphonium IEMs
Price (Msrp): $1,100
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Letshuoer Mystic 8 Details
Driver Configuration: 8BA
Tuning Type: Neutral
Brand: Letshuoer Top Letshuoer IEMs
Price (Msrp): $1,000
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Symphonium Helios User Review Score
Average User Scores
Average User Score: n/a
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Letshuoer Mystic 8 User Review Score
Average User Scores
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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+Letshuoer Mystic 8 Gaming Score

Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
7.1Gaming Grade
A-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.
Letshuoer Mystic 8 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+- Very competent with articulate presentation. Well-defined layers and precise imaging. Soundstage is immersive and handles dynamics well.
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
Letshuoer Mystic 8 Reviews
Surprising in a lot of fronts. Maybe a little bit overpriced but I like itSuper* Review original ranking
Super* Review Youtube Channel
Vocal benchmark for female vocals under $2000. Clean, airy, sweet, ethereal. Better than Diva and direct upgrade to OG Oracle and OG Mangird Tea. What the Braindamage and Cantor wishes they could be. Great technical performance, and scales decently well. Recommended listening volume is mid to high volume around 75-80dbs. Not for bassy libraries like hiphop, and can be a bit energetic on kpop/jpop/rock stuff with a lot of treble. Jays Audio Youtube Channel
Lack Bass Richness, but is a beautiful set. Jaytiss Youtube Channel
Vocal magic, midrange and upper mids are crystal clear while never being too technical Both sub and midbass presence is less than normal which makes this more genre specific, not particularly suited for bass heavy genres
Gizaudio Axel
2025-09-07Neutral-bright tuning with natural midrange tone. Vocal-focused with realistic timbre. Natural, lifelike mids and vocals. Refined treble with air and clarity. Good technicalities. Light BA bass. Unvented design. Upper treble may bother those who are extra sensitive to treble.Gizaudio Axel original ranking
Gizaudio Axel Youtube Channel
check links for more info:Bad Guy Good Audio original ranking
Bad Guy Good Audio Youtube Channel
Smirk Audio
2025-07-16check links for more info:
Symphonium Helios User Reviews
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