Had another good listen to the dacamagic now that it has been left on and warmed up. I can say its a nice device ,would not call it an upgrade though over my Marantz cd player ,it sounds different,not better or worse, not as rich and full but it has better timing . Might get better with use. but I dont believe burn in makes big differences,The fact I can stream endless mp3 files now with better qaulity sound is the reason I bought it but so far I think I prefer the Marantz players own dac for cd playback ....