I was working on this project during last summer. It was an experiment, where I tried to make a speaker with very simple crossover. Lower frequencies were filtered out with capacitors and higher frequencies were filtered with foam of varied thickness. The benefits of this design are low cost(no expensive inductors) and flat impedance (easy load for an amplifier).
This speaker still needs a separate powered subwoofer, because lower woofer is in bandpass enclosure and it's frequency response drops sharply at around 100hz.
I don't have photos of finished speakers yet.