PP 4 Digital Phono/USB Pre-amplifier enables to digitize treasured vinyl collections to a PC or Mac. It features inputs for both MM and low noise MC types for a wide variety of phono cartridges, and there is a line input to allow for the transfer of cassette tapes. The PP 4 uses a shielded USB cable and recording level control, which combine to reduce noise and improve the analogue-to-digital conversion process. As part of NAD’s commitment to the environment, the PP 4 features a more efficient "green" power supply that reduces power consumption. It also has an Auto Power Down feature that saves energy by shutting off when not in use. Designed to enhance one’s listening experience, the PP 4 is the ultimate tool to elevate any turntable system.