This is an updated version of my original Flip3,4 stand (https://www.thingiverse.com/thing:2373156). I added the possibility to fix the stand to the box with a zip tie.
My name is not on the STL I uploaded here. But you can put yours on it, just in case you forget the JBL anywere.

also check out ariuskooos version with three zipties. You can avoid blocking the JBL logo.
https://www.thingiverse.com/thing:3767705