| http://www.w3.org/ns/prov#value | - More particularly, this invention pertains to such a system in which any desired number of units may be added to a main unit and each other to accommodate audiences of different sizes and/or auditoriums or fields, so that the person speaking or other sound, such as music, for example, may be heard clearly without distortion, differences in phasing between the respective auxiliary loudspeaker units
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