Cinaudagraph Dance Music For 20 Tons Of Water

Cinaudagraph was found in the 30's oddly enough by the same family that found the Boy Scouts. The company was wound down in 1939 but reopened some time later with sales in the 40's. Cinaudagraph did it in style go big or go home with single range speakers 24" and 27". They reportedly had a range of 30hz to 16khz -+5db. They didn't believe in crossovers.