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Experiments with the principle of deflection of sound waves have been tried by many manufacturers of best reputation since the 60’s. Their goal was an even, natural sound (level) propagation in the listening room. It has not been solved correctly until this new patented German solution of the problem.

With all conventional speakers, sound delivery is direct (frontal). This does not correspond to the natural propagation of sound from the source. The effect of this direct sound delivery is characterized by the fact that an optimal sonic image is generated only at one point relative to the position of the two speakers (classical “stereo triangle”).

German patented loudspeaker design of the CSS^â, Circle Sound System, works on a principle that simulates the sound production of nature. The sound waves of the bass/midrange driver as well as the tweeter are deflected by a diffuser and coupled such that they propagate evenly in concentric circles. As, at the diffuser, the high frequencies are quasi imposed on, and carried along by, the low frequencies, the sound thus produced enables pleasant natural and spatial sound perception in the entire room.

For example, in the concert hall, the sound effect of a kettledrum or a bass drum does not create a feeling of pressure in the stomach, as it is possible with the traditional front (or parallel) speakers. This unnatural sound reproduction is the result of the sound pressure concentration of front speakers, which causes a perpendicular sound radiation not encountered in nature. (When using several drivers, this type of radiation also causes e.g. comb filter coloration).

CSS^â loudspeakers, due to their design principle, produce a natural sound with good bass reproduction, which shows perfect with music of the organ.

The placement of CSS^â loudspeakers are without problems, because the ”magic stereo triangle” is not needed. However, base separation of the speakers should not be less than 2 meters. Sound radiation is so natural, that it is insignificant in what relation to the speakers the listener is sitting, standing or lying. The listener will perceive a pleasant spatial natural sound level everywhere in the room.

CSS^â loudspeakers offer solutions for acoustically difficult rooms. Speech intelligibility is ensured to a distance of 15 M from the speaker even in acoustically hard rooms. Thus, CSS^â loudspeakers were installed in the difficult listening spaces of the churches in Werben and of the Katharinenkirche in Stendal / Germany.

As the listener need not be at a particular place in the listening room, use of CSS^â loudspeakers is an advantage almost everywhere. Using CSS^â loudspeakers as a surround or multi-channel system is ideal. In connection with such applications, the CSS^â system with only 4 loudspeakers has no equal. To ensure an optic-acoustical placement for the user in DVD/TV or games/computer applications, existing loudspeakers near the screen or small slave loudspeakers may be used as additional center loudspeakers.

In conclusion, it should be noted that due to the construction of the Circle Sound System ^â a host of interesting design variants may be implemented.