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Yu9 audio [fish 9] U-556 fone de ouvido em movimento ferro in-ear monitor de alta fidelidade associado er4b/s/p/xr/554

Yu9 audio [fish 9] U-556 fone de ouvido em movimento ferro in-ear monitor de alta fidelidade associado er4b/s/p/xr/554

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€137.39€196.28
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Specifications

Brand Name
Huo Guang Shu
Power Source
Other, Other
Origin
Mainland China
Communication method
Other
High-concerned chemical
None
Inbox adaptor
No
Compatibility
All Compatible
State of Assembly
Ready-to-Go
Certification
NONE
Bundle
7
Camera Equipped
No
Model Number
ER4B/S/P/XR

Product Description

//www.head-fi.org/threads/yu9-audio-u554-u556-a-single-ba-powerhouse.962479/?spm=5261.im.0.0.57474edfXcVyvl





Brand: Fish 9 audio
Model: U556




Color Classification:
Color Classification:
A:U556 black
B: U556+ a pair of ety new transparent medium size three-section set
C:U554 Sapphire Blue
D:U554+ a pair of ety new transparent medium size three-section set
E: 556 azure + pink spring and summer limited + medium size three festivals
F: 554 azure + pink spring and summer limited + medium size three festivals





Plug diameter: 3.5
Cable length: 1.2
Is there a microphone: No
Wearing method: in-ear
Headphone plug type: right angle L
Whether wire control: NoImpedance: 110





The design goal of the U-554 is to achieve accurate timbre and delicate details, and to present a reliable sound for serious listening situations. It can be understood that the U-554 has a stronger "work" temperament. This is different from the U-556's design goal of "natural mixing in the room", and the two models have their own emphasis and together form the Series 9 in-ear monitor series.
From the frequency response point of view, the 554 has more mid-high frequency energy than the 556, and the full-frequency energy distribution is very flat. Obviously, the 554 is not simulating the room effect, but trying to present the state of the undisturbed sound that reaches the ear. The 554 has a clear and solid image, delicate and elegant high-frequency detail, and clean and accurate mid-range tone. The 554 also uses a unique acoustic rear cavity design. Under the fine tuning of the rear cavity technology, the 554 also has a loose and elastic low frequency response and extremely low distortion, which optimizes the sense of hearing.
In the 554's circular sound field, the sound information is scattered, as long as you pay attention, you will find the sound details are there, and when you withdraw your attention, these elements merge together again. For sound workers, the powerful performance of the 554 is a powerful tool for you to examine the sound.
Sounds familiar, doesn't it, it's a lot like the kind of feeling the er4 series brings us.
It's a bit similar, but not exactly the same. The er4 series is our favorite, but in the workplace, we think that the details of the 4s are not enough, while the 4b is powerful but not natural. In addition, the people of the er4 series The sound is clear and calm, the low-frequency shape is precise but the elasticity and fullness are not enough, the high-frequency is easy to spike in some recordings, etc. ......
In the adjustment of the 554, we have polished the details of these aspects, balancing the relationship between performance and natural hearing. Incorporates our understanding of "job reference".


Product information last updated on February 10, 2026