I won't speak for RDK but I did that exactly: bought a universal Sony changer that was modified by my favorite tube amplifer and speaker builder, Steve Deckert, to have a tubed output running directly off the Digital Analog Converter. Plays cds, SACD and dvd, and MP3 cds. IT BLOWS AWAY, sound quality wise, my last cd player, which was no slouch, a Dynaco CD2 which I very much enjoy. I wanted to have one player for cd and SACD; there are a number of SACDs that I want to get and SACD is an improved digital format I find (though not the ne plus audio ultra that some fanatics of the format seem to claim). This Decware DEC 685 took a long time to break in, but I am getting wonderful sound! Had to force myself to shut off the "Sketches of Spain" SACD to come to work about 40 minutes ago. . . I could have stayed listening all day if I had my druthers!