First custom earphone in the world with a single 14mm dynamic driver couples with advanced frequency suppression technology (FST). Frequency Response: 10-20000 Hz Impedance：16ohms（including cable） Sensitivity (at 1kHz)：116dB spl (1mW) Important: Due to the size of the driver, people with small ears may not be able to fit. We would need your ear impressions to check for sizes...
“ So far, up until now, I've never owned true customs IEM. I have owned three universal reshells (UE triplefi10 twice, and Klipsch Custom 3 once), but I'm on the fence that a true custom is born from a specific sound signature developed by the company/brand that is repeatable in every custom build regardless of the wearer's ear anatomy. Let's get started... For weeks, I...” --alphaphoenix