High-End Audio Decoding: The XDuoo MU-604 is a premium digital audio decoding preamp designed to elevate your listening experience. It seamlessly integrates USB, Optical, and Coaxial audio inputs, delivering high-quality analog signals through one balanced and one AUX OUT. Perfect for connecting to your amplifier or active speakers. Advanced USB Technology: Featuring the XU208 chip from XMOS, the MU-604 supports asynchronous transmission and playback processing. It offers a maximum sampling rate of 32bit/384kHz and DSD256, ensuring superior audio quality. With support for USB 1.0 and 2.0 switching, it adapts to a wide range of USB audio devices. Superior SPDIF Performance: The MU-604 utilizes the CS8422 SPDIF chip, which accommodates both coaxial and optical inputs. It supports a maximum sampling rate of PCM 24bit/192kHz, providing flexibility and high-fidelity sound for your digital audio needs. Dual ES9018K2M DAC Chips: Equipped with two ES9018K2M chips, this DAC offers exceptional parameters and sound quality, particularly in balanced output. Experience rich, detailed audio that brings your music to life. Perfect for Mid-to-High-End Systems: Designed to pair seamlessly with mid-to-high-end amplifiers or active speakers, the MU-604 delivers a new level of audio clarity and depth. Transform your listening experience with this sophisticated audio solution.