LED 101 / Hardware
LED cabinets
The cabinet is the frame that holds modules, power supplies, and receive cards. Flat machining is what keeps the seams from showing.
A cabinet is one structural tile of a media wall. Inside: LED modules on the face, power supplies that turn AC into the DC the modules want, one or more receive cards, and often a hub board that fans data out to the modules. Cabinets lock to their neighbours to build the full screen.
Machining tolerance is not a boutique detail. If cabinets are out of flat, you see seams and wavy pixel lines. That shows up on fine-pitch walls and on any wall people stare at for an hour. Die-cast or well-machined frames matter more when the wall travels: rental, carts, demo units, rooms that get struck and rebuilt.
Cabinets also manage heat and protect the electronics. Outdoor cabinets seal differently from indoor gym cabinets. Front-serviceable designs let a tech swap a module from the room side without clearing a service corridor behind the wall.