What is the major difference between connecting a CD changer or player to a receiver through the analog RCA connections or either the coax or optical digital connections? Is there a major sound difference, and why are CD players even equipped with ANALOG RCA outs if it's a digital appliance? My Marantz CC67 five disc changer is connected digitally to a Marantz DR700 CD recorder, but for SOUND LISTENING purposes, the changer is going to my Onkyo receiver through gold-plated Monster RCA cables....am I losing something by LISTENING to CDs through a player's RCA terminals?