So after taking a bit of inspiration from the "A Dodecahedron Speaker for Desktop Printers" project by 60cyclehum I decide to have a go at building my own dodecahedron speaker.



I don't own a 3D printer so using an online service to print 12x the parts would have been very expensive. Because of the modular nature of this design I saw a way to greatly reduce the cost by instead 3D printing a mold and using that to cast the 12 faces. In this case I used concrete because its cheap and would give the speaker a unique look.

The finished speaker measures ~150mm across and weighs ~1.75kg

The .stl's for the mold I designed are attached: Its designed around the speaker dimensions shown but you should be able to scale that model up to fit different speaker diameters..

If you're like me and don't have your own 3D printer I would recommend using the services of 3DPRINTUK

Stuff you'll need:

Parts:

3d printed mold

5pcs x M4x20mm bolts and wing nuts

12pcs x Speakers - The ones I've used are 4 ohm, 5W & 57mm diameter - Monacor SP 6/4

Main Speaker cable - the one that will connect the speaker to your source

Speaker cable to wire the 12 speakers together - I got a 50m reel of 2x13 strand for £6 (more than enough!! maybe a 2nd speaker??)

Rope - length depends on what you want to hang it from..

Wood offcuts & 0.8mm plywood sheet

Consumables:

Primer and gloss spray paint - any colour will do

Concrete - I went for rapid set to speed up production, I got a 10kg bag which was more than enough

Grab adhesive - Something like "Evo Stik Sticks Like Sh*t" - made sure what you use can bond to two impervious materials..

Mold release (hair wax)

Solder

Heat shrink / electrical tape

Tools/Equipment: