Abstract: A loudspeaker of the present invention includes a loudspeaker cabinet and at least one loudspeaker element having a loudspeaker membrane. A plurality of sound passages define a cavity in a wall of the cabinet, and each sound passage terminates on one end in a proximal aperture acoustically coupled to the loudspeaker element and on the other end in a distal aperture acoustically coupled with exterior surrounding of the cabinet. In this way, the loudspeaker membrane is acoustically coupled with the exterior surroundings of the cabinet. The distal aperture of a one sound passage communicates with a distal aperture of another sound passage, and the sectional area of the distal aperture of the first sound passage is different from the distal aperture of the second sound passage. The first and second sound passages have different lengths.