I have a basic Marantz amplifier and a basic Marantz CD player. Marantz SR-47 amplifier (with a Marantz CD-38 compact disc player) My main interest is classical music. I do not know much about Hi Fi & have discovered this forum recently. I want to understand more about improving sound quality before I venture into upgrading. / My question at the moment is: Which in general plays a more important part in quality : the CD player, or the amplifier ? (at the moment omiting the issue of speakers). Thanks in advance for your assistance.