There is a fair amount of skill necessary with a power drill, Dremel motor tool, soldering iron, and hand tools to perform this build described. I am only describing my method of making this, which is easiest for me. If you feel you need a drill press to drill a hole instead of by hand, then by all means do what you think is easy and safe for you. Some of the practices I do in this Instructable may be tricky, risky, and dangerous when proper safety practices are not adhered to. USE COMMON SENSE! Wear eye protection and hearing protection when using a Dremel, drill or other power tools. With that out of the way, HAPPY BUILDING:)
Step 1: Materials list
From them, we get a 1/4" earphone jack, wire, and 2 speaker elements.
4 Grade m5 bolts, with a head diameter of a little more than your speaker outer diameter. Around 1" long.
Friction tape (optional)
1 pack Sugru (Moldable silicone). Sugru.com (good stuff to have anyway)
2 steel nails, slightly bigger than the hole you drill for the sound hole. I used 8 Penny nails, and 3'16" bit.
For tools, here is what helps to have on hand:
Dremel, and cutoff wheels
Hand drill, or drill press
Wire stripper (optional)
Various common hand tools
Volt Ohm Milliammeter (VOM)
An assortment of common drill bit sizes, including a 5/8", 5/16", (the drill bits I used)
Small eyeglass repair screwdriver, regular tip
Hammer (ball peen is best, but any will do)