The extraordinary design of the Excenter successfully combines the beneficial acoustic properties of spherical horns, open baffles and point sources in a single speaker. The horn is powered by a full-range speaker; a subwoofer takes over only under one hundred hertz. This low crossover frequency has great advantages and was one of the aims in developing the big horn. It is important to note that the human voice in its transmission range, which reaches down to eighty-five hertz in its deepest tones, is transmitted without breakage by just one chassis.