Boards were mounted on the heat sinks and mounted on the enclosure. Power supply board and toroidal transformer were bolted in. Legs put on. IEC connector, RCA connectors, and speaker binding posts inserted into back panel. Switch inserted in front panel. Several wiring harnesses were fabricated and connected. The back panel and front panel were laser etched with logos and language at TechShop, a national DIY workshop with a location in San Jose. Very straight forward assembly.