A removable tilt-back stand for guitar amplifiers.
Amps are usually parallel to the floor but if you want to hear it better you probably should point it at your head for some monitoring in live situations. This is a nice, minimal solution that you can just throw in the back of your cabinet and quickly install when you need it.
This one was designed to fit my Fender Princeton Reverb Reissue amp. It slides on to the back bracing panel, which is about 11mm thick. I also tried this on another tube amp I own, and the thickness was the same so this may be a standard sizing.
Requires a 0.5-in (12.7mm) diameter wooden dowel, which you can get at an art supply or hardware store for a couple of bucks. Saw one end at a 45 degree angle (3d print a mitre box if you need!) and the other end straight across at the desired height for the angle you want. I cut mine at 8-in. but it depends on where the bracing of your amp is located and what angle you want to achieve.
So assuming you want a 45-degree tilt: how to calculate the exact length of the dowel? Measure the height to the bottom of your amp's back bracing (in cm) then divide by 1.1412. That will get you in the ballpark plus/minus some offsetting due to added height from the attachments. Thanks Pythagoras.
Attach and glue the corresponding 3d-printed pieces to each end of the dowel. You might want to replace the rounded bottom cap with a 0.5-in diameter rubber foot if you want some more grip. Or print it in TPU if you can.
Should not need supports. Print with the circular opening pointing down.