Of course to insert these bits of machined brass, you need to press them in, and unless you’ve got a very good hand with a soldering iron it’s usually a good idea to use a press of some sort.

Remove the plate and use it as a pattern for your speaker insert. You can replace the original brass plate with a new 1/8" thick bar or create a layered insert using thinner materials.

Sometimes, when making a 3D printed object, plastic just isn’t enough. Probably the most common addition to our prints is the ubiquitous brass threaded inset, which has proven its worth time … ...