I made my speakers on calligraphy paper with copper tape. The first one I made was the one on the bigger sized paper with a small circuit. The second one was the small paper with circuit to almost the edge of the paper. The last one I did medium sized paper with the circuit very, very close to the edge. I wanted to see if there would be a difference in the sound if I made the circuits all different sizes using the same materials. I experimented with different sizes of paper, copper tape, and circuit.