【Innovative Dual-Layer Structure】 DAC and Amp Completely Separated. One layer for the digital DAC circuit, one for the analog headphone amp circuit. The Yuki is designed with True High Fidelity reproduction in mind. The ultimate sound quality is our goal. *[Discrete Headphone Amp with Transistors] The discrete headphone amp board with ±5 V power supply has 16 transistors to form the 4-way headphone amp. Compact yet powerful 【Dual DAC, 32 bit/768 k DSD256, ±5 V Boost Converter, 4.4mm+3.5mm】 YUKI Portable DAC with Headphone Amp equipped with dual CS43198 DAC chip. Two channels completely independent. Better dynamics and separation. Up to 32 bit/768 k DSD256 when pairing with a computer. The 4 independent headphone amps with the ±5 V supply and the outputs of balanced 4.4 mm and single-ended 3.5 mm, can drive your IEMs and earphones with ease. The outstanding sound performance makes Yuki a great partner for all kinds of earphones 【Ceramic Substrate】The circuit board of aune's YUKI utilizes a ceramic substrate. In addition, the 4-way balanced headphone amplifier circuit is discrete, with 4×4 transistors driving the outputs, and the ceramic substrate's excellent thermal conductivity, high electrical insulation, and resistance to high temperatures provide the basis for pure and stable sound quality 【High-Spec Aesthetic Tuning】 Headphone amplifier output noise: 2.9 μV, THD+N: 0.00033% @1 kHz.T he excellent hardware performance has laid a solid foundation for excellent sound. The tuning is based on real instrument sounds and music pieces referencing, leading to the signature that is natural and full of musicality 【Aesthetic Design: Snow White & Crystal Clear】 All-aluminum alloy structure, fine baked painting finish, glass window. The whole aesthetic design intends to make you feel the beautiful combination between art and technology Yuki, aune's new portable DAC with headphone amp, is equipped with dual CS43198 DAC chip. aune innovatively designed the dual-layer structure, separating the digital circuit and the analog headphone amp circuit. Moreover, the 4-way balanced headphone amp circuit has 4×4 transistors to drive the output. It is a unique “dongle” that purely focuses on sound.