Hi I have seen a few on the net and I saw one at a protest once and I was wondering has anyone put one together before? I sort of have a basic idea of what I need... car stereo head unit amp 12v car battery speakers a box / wheelie bin But my problem is what do I need to wire it all together? do I need a head unit? or can I run an ipod or similar straight into the amp? will I need to earth it out and how would I do that? there's probably a ton of stuff that I'm not taking into consideration that I probably should so any help would be much appreciated. below link showing them in action