The Marantz CDR-640 is a versatile CD recorder known for its ability to record audio onto CD-R and CD-RW discs. It features a compact and user-friendly design suitable for both home and professional use. The device allows users to create custom audio CDs from a variety of source inputs, including external devices. Notably, it supports both digital and analog inputs, offering flexibility in recording options. The CDR-640 includes a variety of playback features and supports multiple formats, ensuring broad compatibility with different audio media. The device also features an intuitive user interface with clear display options, making navigation easy. Its built-in features often include pitch control and a timer function, beneficial for precise recording sessions. Additionally, the CDR-640 is equipped with a high-performance digital-to-analog converter (DAC) to ensure high-quality sound reproduction. Its design typically incorporates robust construction to enhance durability, making it suitable for prolonged usage. Overall, the Marantz CDR-640 stands out for its recording capabilities and sound quality in the realm of audio devices.