My RME replaced a NAD M51, a very good DAC no doubt but the RME has clarity unlike any other source I've ever used . Bass is incredibly realistic, upright bass and kick drums, which are tough to reproduce , are faithfully rendered. Its dynamic, detailed, black background. Plug and play with any device I have connected via USB...software is excellent no need for drivers . Install the RME digicheck software and its a bi directional recording interface.... more importantly it just works. With iPhone, iPad, windows 10, Samsung Tab....have music on a device? Play it right through the RME's USB input... great remote, selectable digital filters, 5 Band PEQ , Loudness contour ( adjustable), Bass, Treble, Balance, very good headphone amps with Cross-feed, a bunch of other stuff too if you dig into the 70 page manual..