This is a simple two-piece clip-on enclosure for those inexpensive passive 4-channel mixers currently being sold on Amazon and the like.
I am unsure of the actual origin brand of this mixer, but it seems to be a pretty commonly-cloned design, with black acrylic top and bottom, PCB suspended in the middle, and five potentiometer knobs on the top. The listing I bought mine from calls it “PROZOR”, but you can find it branded as “HERCHR”, “Arklove”, “Keenso”, “GOWENIC”, and perhaps others.
There is a similar design branded as “Little Bear” and “SOLUPEAK”, but that one may not fit this enclosure (the top/bottom pieces are cut differently).
Simply snap the mixer module onto the springy clips in the bottom of the case, then clip the bezel piece onto the top of the mixer. The mixer itself is what holds the two enclosure pieces together. You may need to press inward on the two bendy bits on the bottom, to push the mixer module up a tad so that the bezel can grab it.
The two pieces are meant to fit with a slight interference, so that the clips in the on bottom will pull them together via the body of the mixer.
My mixer came with four stick-on rubber feet, so if yours has them also, transfer them to the bottom of the enclosure before trying to snap the mixer in.
No supports needed, 0.2 mm layer height is fine. Pictured here is Atomic deep black PETG.
Note: the Blender project file depends on my 3d printing toolkit/library for some materials: https://www.printables.com/model/16640-my-blender-3d-printing-partsmaterials-library
The author marked this model as their own original creation.