An electrostatic loudspeaker assembly providing curvature in two directions for improved dispersion of sound waves. A user database is also maintained with user records for various users, each user record comprising the user’s identification data. An adjustment of the variable displacement pump and of the meter-in orifices takes place electronically through the intermediary of a control means in dependence on the target values input by an operator. A guide factory then automatically updates or modifies the first program guides the second program guide, parameters of the system, andor a configuration of the system in response to the user provided input data.