Flat panel Electromechanical Film (EMF) loudspeakers operate on electrostatic principle. In the EMF loudspeakers, the Electromechanical Film vibrates inside the porous plates in the electric field producing sound. The size of a loudspeaker panel is 500 mm x 600 mm. Nine panels are joined together to 3 x 3 configuration to form a large, flat surface. Each panel is driven with individual signal. The behaviour of the system is studied by modelling, measurements, and listening tests.