Yu9 U556 VS Etymotic ER4S

IEM Comparison: Expert & Community Scores Side-by-Side

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Yu9 U556 and Etymotic ER4S are in-ear monitors. Yu9 U556 costs $136 while Etymotic ER4S costs $300. Etymotic ER4S is $164 more expensive. Etymotic ER4S holds a decisive 3.3-point edge in reviewer scores (4.7 vs 8).

Insights

Metric Yu9 U556 Etymotic ER4S
Bass 4 8
Mids 6 8
Treble 5 8
Details 4 8
Imaging 4 8
Dynamics 4 8
Tonality 5 8
Technicalities 4 8
Take these comparisons with a grain of salt—we don't have enough Yu9 U556 and Etymotic ER4S reviews saved yet to provide an unbiased result.

Yu9 U556 Aggregated Review Score

Average Reviewer Scores

Precogvision

Average Reviewer Score:

4.7

Generally Unfavorable

Etymotic ER4S Aggregated Review Score

Average Reviewer Scores

Super* Review

Average Reviewer Score:

8

Very Positive

Reviews Comparison

Yu9 U556 (more reviews)

Yu9 U556 reviewed by Precogvision

Precogvision 4.7 Reviewer Score
C+ Tuning
C- Tech
A hair too forward in the pinna compensation, but generally well-tuned and a competent performer.

Precogvision original ranking

Precogvision Youtube Channel
Bass: C- Mids: B Treble: C+ Dynamics: C- Details: C- Imaging: C-

Etymotic ER4S (more reviews)

Etymotic ER4S reviewed by Super* Review

Super* Review 8* * score rescaled + normalized
check links for more info:

Super* Review original ranking

Super* Review Youtube Channel

Yu9 U556 User Review Score

Average User Scores

Average User Score: n/a

Based on 0 user reviews

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Etymotic ER4S User Review Score

Average User Scores

Average User Score: n/a

Based on 0 user reviews

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Yu9 U556 Gaming Score

Gaming Score & Grade

  • The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.

Gaming Score

4.3

Gaming Grade

C-

Etymotic ER4S Gaming Score

Gaming Score & Grade

  • The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.

Gaming Score

8

Gaming Grade

A+

Yu9 U556 Scorings

Average Technical & Tuning Grades

Average Tunign Grade

C+
  • A mostly enjoyable signature keeps things listenable despite a handful of quirks. It handles most playlists without major complaints.

Average Technical Grade

C-
  • Textural information blurs together, making the stage feel pinched and gray. Instrument edges blur together frequently.
Bass C-
It keeps the low end tidy, though energy and weight remain limited. It favors balance over excitement.
Mids B
Expect a confident midrange that keeps details audible without harshness. Acoustic arrangements sound engaging.
Treble C+
Treble is decent, offering acceptable extension without harshness. It balances presence with a touch of restraint.
Dynamics C-
It maintains a steady dynamic profile that neither offends nor inspires. Swells arrive but lack drama.
Details C-
The presentation is fine for casual listening but leaves refinement on the table. There's some grain on quieter elements.
Imaging C-
Average imaging delivers reasonable localization while still lacking pinpoint specificity. You get a reasonable idea of placement.
Gaming C-
Minimal environmental definition provides only general audio cues. Suitable for games where positioning isn't critical.

Etymotic ER4S Scorings

Yu9 U556 User Reviews

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Etymotic ER4S User Reviews

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