Auringossa
Kari writes –

I have always been interested in electronics. Building mechanical things hasn’t been hard either. Project started somewhere around year 2003 and I began the work by researching what kind of components and circuit are available and how to fullfill the requirements I had in my vision:

* Must be mobile and use battery
* A LOT of power and volume
* Relatively good sound quality
* Plenty of bass ;)
* Party should last long enough and therefore the battery should do it as well!
* And of course it should look absolutely cool
* Internal signal source not required. Just input for MiniDisc, iPod, whatever

Supaghettoblaster, Thanks Pekar! Link.