This is the complete DIY parts kit for YOU to upgrade, restore, and rebuild YOUR NAD 304, and in the process, take care of all the well-known defects. The kit includes approximately 80 parts (depending on your version) and full instructions. Only the highest quality 105°C components (temperature-rated for Power Supplies) are used from the following manufacturers: Vishay, Panasonic, Nichicon, Bourns, Schrack, and Wima. The circuit boards are very similar whether your's is the Green or the Blue version, (with negligible technical differences), so the work involved is essentially the same....