18/05/2019 Version 2:
Version 2 has been improved for printing in the back; now the print should look more beautiful.
I added an empty space inside to add weight; in the previous version, heavy headphones tend to overturn everything. (fishing lead should be good)
I removed the screw holes; just add a thread of glue if it goes too slow.
The top part, I made a change to print better.
you should print without media; otherwise it will be difficult to eliminate supports inside.
Many people can not print with dimensions greater than 20x20 cm;
The makerbot headphone support when scaled for a 20x20cm flat printer is too small;
So I thought of creating the base in a similar way; just a plate of 16cm in size!
Also I added 2 holes for USB support.
You only need:
1x Aluminum/wood tube 10x1 or 10x2 (10mm outside diameter)
2x wood screws 4.5x15mm
Cut the tube at will; 25 - 30 cm usually should be fine.
You can print the base with a larger fill to make it heavier; it should work well the same.
For the upper piece; if your printer can print overhangs up to 62 °, do not use supports