Billed as "a motor-car symphony", the American Simplex was an American automobile manufactured in Mishawaka, Indiana, USA, from 1906 to 1915 by the Simplex Motor Car Company; the company shortened its product's name to Amplex in 1910 to avoid confusion with the better-known, New York-based Simplex car, made by the Simplex Automobile Company. This change also coincided with a reorganization of the company. Originally the company manufactured a two-stroke four-cylinder 50hp model, later upsized to 6.8 liters and still rated at 50 hp. In 1910, three open-roof models and two enclosed models were offered, costing up to $5,400; the newly introduced 30/50hp Toy Tonneau, a long, sleek four door touring car, sold for $4,300. The Amplex's most distinctive feature was its valveless motor, which the c