A method for designing a line array loudspeaker arrangement, the loudspeaker arrangement comprising electronic filters and a loudspeaker enclosure equipped with loudspeakers that are connected downstream of the filters, have a membrane and are arranged to form at least two arrays; the method comprising: providing design start parameters including a number of loudspeaker arrays, a number of loudspeakers per array, distances between loudspeakers per array and loudspeaker membrane sizes per array; providing a loudspeaker arrangement based on the design start parameters and including the at least two arrays, wherein one of the at least two arrays is a first vertical array, and the loudspeakers of the first vertical array are multiway loudspeakers; measuring the frequency responses of the loudspeaker arrangement with bypassed or omitted electronic filters at predefined horizontal angle increments; computing combined beam forming and crossover filter frequency responses for a first vertical array based on the measured frequency responses of the loudspeaker arrangement and first target frequency responses at various frequency points and various positions, the first target frequency responses being constant-beam-width transducer target frequency responses that specify desired frequency responses of the line array loudspeaker arrangement to be designed; computing combined equalizing and crossover filter frequency responses for the first vertical array based on second target frequency responses, the second target frequency responses being the combined beam forming and crossover filter frequency responses for the first vertical array, and the combined equalizing and crossover filter frequency responses being configured to obtain acoustic linear phase responses of the line array loudspeaker arrangement; computing horizontal beam forming filter frequency responses based on the measured frequency responses of the loudspeaker arrangement and third target frequency responses, the third target frequency responses specify desired horizontal frequency responses of the line array loudspeaker arrangement to be designed; and designing the electronic filters based on the combined beam forming and crossover filter frequency responses for the first vertical array, the equalizing and crossover filter frequency responses, and the horizontal beam forming filter frequency responses, wherein computing vertical beam forming crossover filter parameters for the first vertical array comprise a non-linear optimization procedure minimizing at each frequency point a first error that corresponds with the difference between the measured frequency response of the loudspeaker arrangement and the constant-beam-width transducer directivity target frequency responses. providing design start parameters including a number of loudspeaker arrays, a number of loudspeakers per array, distances between loudspeakers per array and loudspeaker membrane sizes per array; providing a loudspeaker arrangement based on the design start parameters and including the at least two arrays, wherein one of the at least two arrays is a first vertical array, and the loudspeakers of the first vertical array are multiway loudspeakers; measuring the frequency responses of the loudspeaker arrangement with bypassed or omitted electronic filters at predefined horizontal angle increments; computing combined beam forming and crossover filter frequency responses for a first vertical array based on the measured frequency responses of the loudspeaker arrangement and first target frequency responses at various frequency points and various positions, the first target frequency responses being constant-beam-width transducer target frequency responses that specify desired frequency responses of the line array loudspeaker arrangement to be designed; computing combined equalizing and crossover filter frequency responses for the first vertical array based on second target frequency responses, the second target frequency responses being the combined beam forming and crossover filter frequency responses for the first vertical array, and the combined equalizing and crossover filter frequency responses being configured to obtain acoustic linear phase responses of the line array loudspeaker arrangement; computing horizontal beam forming filter frequency responses based on the measured frequency responses of the loudspeaker arrangement and third target frequency responses, the third target frequency responses specify desired horizontal frequency responses of the line array loudspeaker arrangement to be designed; and designing the electronic filters based on the combined beam forming and crossover filter frequency responses for the first vertical array, the equalizing and crossover filter frequency responses, and the horizontal beam forming filter frequency responses, wherein computing vertical beam forming crossover filter parameters for the first vertical array comprise a non-linear optimization procedure minimizing at each frequency point a first error that corresponds with the difference between the measured frequency response of the loudspeaker arrangement and the constant-beam-width transducer directivity target frequency responses.