I came to this product from the ADI-2 DAC. I was so thoroughly impressed with the smaller brother, that I had to have this and I have zero, zilch and nada regret. If you need a function you have it here. Sample rate conversion from 32 to192khz for your old CD player. Digital signal refreshing. AD converters are so good you can plug your grammophone for further sound processing. PEQ for speaker and headphone correction. Progressive loudness, very, very clever. Hybrid digtal/relay volume control is a dream to use. Like other RME products, sound is very correct and neutral, but you can adjust it to your liking via excellent 7 band PEQ. The ADI-2 pro takes some dedication to tap into its full potential, The supplied instruction book, and it is a book at 96 small font pages covers most of it, but youll be guaranteed to have at least one more question. Of course you could just plug and play it, but that defeats the purpose of this feature specked equipmet. Only top score minus one star for handling(4 * aint bad). If you are prospecting this product I could recomend looking at the downloadable manual at RME website. Great forum too with daily input from users and RME designers.