audio-sound @ hatena

An audio review & news blog. The volume should not exceed 80 dB is recommended. I usually adhere to the safe-listening style by WHO. Please note that my aural impressions and interpretations of measurements are also made from a safe-listening style.


(Chi-fi IEM Review) Yu9 U-556: Excellent Etymotic clone that overcomes the weaknesses of the ER4B and offers a more natural texture

The Yu9 U-556 is an Etymotic-like IEMs with excellent textural expression and has a sound that beats the original ER4B in that it is more accurate in the midrange. For more purist Etymotic fans, I recommend the U-554, but for those seeking…

(Chi-fi IEM Review) Yu9 U-554: A well-made etymotic clone. An alternative to ER4B. Recommended for vocal songs and ASMR

The Yu9 U-554 is a well-made clone of the Etymotic Research ER4B. It has an improved fit, improved usability, and definitely better value for money than the original. The packaging is not cheap either.