Stealthsonics U9 JDM Aggregated Review Score
Stealthsonics U9 JDM Average Reviewer Scores
Average Reviewer Score:
5.5Generally Unfavorable
Symphonium Helios SE Aggregated Review Score
Symphonium Helios SE Average Reviewer Scores
Average Reviewer Score:
8Very Positive
Stealthsonics U9 JDM Details
Driver Configuration: 1DD+8BA
Tuning Type: Neutral with bass boost
Price (Msrp): $1,100
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Symphonium Helios SE Details
Driver Configuration: 4BA
Tuning Type: n/a
Price (Msrp): $1,150
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Stealthsonics U9 JDM User Review Score
Stealthsonics U9 JDM Average User Scores
Average User Score: n/a
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Symphonium Helios SE User Review Score
Symphonium Helios SE Average User Scores
Average User Score: n/a
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Stealthsonics U9 JDM Gaming Score

Gaming Score & Grade
- The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.
Gaming Score
4.5Gaming Grade
CSymphonium 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+Stealthsonics U9 JDM Scorings
Average Technical & Tuning Grades
Average Tunign Grade
B-- Flawed execution of tonal character. Noticeable peaks/dips affect timbre and coherence. May suit specific genres but lacks refinement.
Average Technical Grade
B-- Competent but unremarkable. Decent detail retrieval in quieter tracks, though busy sections challenge cohesion. Imaging is average, lacking depth.
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.
Stealthsonics U9 JDM Reviews
Stealthsonics U9 JDM reviewed by: Crin
Does away with the timbre issues of the standard U9. Crin Youtube Channel
Symphonium Helios SE Reviews
Symphonium Helios SE reviewed by: Jays Audio
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
See Helios but with more mid-treble and mid-bass. Precogvision Youtube Channel
Symphonium Helios SE reviewed by: Nymz
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.
Stealthsonics U9 JDM User Reviews
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Symphonium Helios SE User Reviews
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