Yu9 Audio's Etymotic clone earphones, the Yu9 Audio U-556, have been released.
- Ultimate monitor sound
- Lightweight design
- True-to-life fit of Etymotic monitors
- Driver: 1BA
- Impedance: 116 Ω
- Frequency range: 20Hz to 16kHz
- Sensitivity: 96.5dB/100mV
- Connector: 2pin 0.78mm
Pursuit of a natural sound beyond nature
The Etymotic Research ER4 series aims to "face the sound directly". At the same time, some users of the ER4 series have complained about "overly bright highs and lows, and an unnatural listening experience. This is because only a limited number of people have experienced direct sound without interference in an anechoic chamber.
The U-556 is based on the same free-field target standard curve as the Etymotic, but with a sound design that decays smoothly from low to high frequencies, creating a natural and soft listening experience similar to listening to a well-tuned speaker system in your own room.
The mids are gentle and sweet, blending reasonably well with elements in other frequency bands, so you won't get tired of listening during long listening sessions.
To improve listening performance, Yu9 Audio focused on third-order harmonic distortion in the lower midrange. Noting that this region directly affects the clarity of the mid to upper midrange, Yu9 Audio reduced harmonic distortion in this region to improve imaging performance in the higher frequencies, resulting in improved overall clarity and a smoother tone.
Unique cavity design
Through a precise and rigorous manufacturing process, the acoustic impedance is optimized by the multi-layer structure of the matched rear cavity to reduce low and mid frequency nonlinear distortion. This, coupled with superior circuitry, results in a more optimized reduction of overall linear distortion.
Yu9 Audio's first confident work
Although the U-556 is Yu9 Audio's first product, the team at Yu9 Audio has actually designed a number of headphones before this. However, Yu9 Audio honestly confesses that most of them were not as good as their esteemed ER4 series in terms of sound quality and cost performance. They diligently researched, learned from the classic sound design of the ER4 series, and honed in to create a product that evolved from it.
Yu9 Audio has been selling replica ER4s for more than 4 years now and has been improving them, but the U-556 is the first IEM that can be considered their original branded product. it offers the same fit as the ER4 series, but with a unique cavity design that further optimizes the sound. The U-556 is the first of their original branded IEMs.
Price & Availability
The Yu9 Audio U-556 is going to be an excellent and inexpensive option for users who love the Etymotic ER4 series. It is priced at $136 and is available at Aliexpress.
Yu9 Audio U-556