xDuoo is a professional in high-end audio product development; design and sales. They have a strong and profound technical capability, professional knowledge background in the audio field, and unique Audio technicians. They are ODM for many well-known brands over the years and win a good reputation and trust in this field. Their main products are headphone amplifiers, Audio DAC, PC HI-FI DAC, phone audio DAC, music players, and so on.