Ive always said that with a little imagination and thinking outside of the box the ULTIMATE boombox with amazing power, bass and and a really wide frequency response (hitting even below 20hz) could be built. In the link below, imagine that rotary subwoofer with a speaker cabinet on each side and a handle to carry the now 3-piece boombox. Manufactures if u are reading this, let's start thinking bigger. I'd be the first one to buy such a box.
http://www.eminent-tech.com/randd2.html
http://www.eminent-tech.com/randd2.html