K1M Type loudspeakers (linear loudspeaker matrices) are the newest achievement of Rduch firm. They are constructed especially to amplify cathedrals, churches and congressional buildings i.e. acoustically difficult spaces (with large reverberation). K1M loudspeakers have appropriate filtration system and arrangement of the loudspeaker units inside the loudspeaker, which ensures increased orientation of the sound emission. Each loudspeaker unit emits signal of proper frequency band. Specially designed loudspeakers enable unbelievably clear and natural quality of sound, which guarantees excellent intelligibility of both voice and music. The difference between a conventional loudspeaker and a linear loudspeaker template is noticeable in several aspects. The template ensures homogeneous distribution of sound in all amplified area: not too loud when close to the loudspeaker and not too quiet on the edges of the amplified area. The template can cover a larger space and thus more people can hear the voice and music with high intelligibility. All these attributes make up reception of very natural sound in the whole listening space.