![]() The audible severity of modest intermodulation distortion is not well established. Reproducing multiple frequencies with the same diaphragm causes intermodulation distortion, a non-linear effect that occurs when one surface attempts to reproduce both frequencies simultaneously. Critical reaction Ĭritics of full range drivers cite their inability to reproduce the full range of audio frequencies at similar amplitudes, leading to inaccurate reproduction of the audio signal sent to it. There are full-range speaker systems using up to 15' single drivers. Some full-range speaker systems are designed with limited-range drivers, and must be used with equalizers to flatten and extend their frequency response, while others achieve acceptable response without electronic assistance. Several manufacturers build small (typically 115 mm (4.5')) diameter full-range drivers into miniature enclosures, and many of these include 25 or 70-volt line transformers, for use on commercial sound systems employing long speaker cables. While these drivers are classed as 'full-range', it may be more accurate to term them 'wide-range' drivers, since their output abilities rarely extend to the extremes of the frequency range. These convey background music and announcements to workers and visitors in retail stores, and public spaces. A large number of full-range drive units are used in commercial sound systems, which may employ a number of 200 mm (8') full-range drivers, mounted into suspended ceilings or small 'back-box' enclosures.
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