Ultralinear Audio Design's 5000 is a high-end DAC (Digital-to-Analog Converter) that utilizes an innovative, fully discrete, ultra-linear design. Unlike most DACs in the market that use multiple stages of negative feedback to create an average linear performance, this DAC eschews negative feedback altogether. The design results in a remarkably open, holographic, precise, and dynamic sound with exceptional resolution. Additionally, the 5000 features innovative variable gain controls, custom-made MUSES ES9028PRO DAC chips, and an external PSU (Power Supply Unit) for optimal audio performance. Overall, the Ultralinear Audio Design 5000 is a top-of-the-line DAC that caters to audiophiles seeking an uncompromising audio experience.