DESC: Designed to Deliver Satisfying Sound Quality Inheriting many of the sound quality features of the S2000/S1000 Series components, this CD changer delivers sound that will satisfy devoted music fans. In addition to CDs, it also provides high quality play of music files stored on digital audio players like iPod or USB memory devices via a USB port on the front panel. Pure Direct The CD-C600 provides the same Pure Direct feature that is a popular feature of Yamaha amplifiers and receivers. Pressing the button on the front panel or on the remote control shuts down the digital audio output and turns off the display. This achieves the lowest possible noise interference and thus highest sound quality of the analog audio output. Extremely Sophisticated Circuitry and Layout Yamaha technicians devoted a great deal of time and effort to designing the overall interior layout of parts and circuit boards, a factor that significantly affect sound quality.