Picked up a NAD PP4 preamp to make CDs for my car. Newer Subarus don't have cassette decks anymore. The Mrs donated a MACBook. Got the NAD in Dec and opened it today to try on the Marantz. I know these comments are old and many have been there and done this. Sound is cleaner through the NAD. Vocals are easier to hear the words. Bought on Ebrey half price of a new one. Didn't come with a USB cable. If anyone knows the part number drop a line. Even a low end preamp is a step up. Thanks