This model is not really suited for 3D-printing. It's huge and has lot of oblique planes that come out jagged when printed with an FDM printer, requiring extra finishing work, that could easily be avoided by changing the design. The base is hollow and requires support structures. The plugs in the arms that go into the base are not level with either of the sides of the arm and thus also require support structures. Making two arms also makes the design complex, as one well structured arm could replace the twin design and nearly half the required printing time and material. The part on which the headphones rest against is not really needed.
I do not recommend printing this model. Go find another one.