The Prisma Loudspeaker - a shapely adventure

George Ntanavaras wanted to design some simple speakers for his surround system. However, he found that things are not always as simple and easy as they seem. In the process, he tested many different physical shapes and configurations and found one that fulfilled his requirements and still could be placed unobtrusive in the average listening room. The article present measurement on the various prototypes and discusses the reasoning leading from one to the other.