Commercial Applications
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. These convey background music and announcements to workers and visitors in retail stores, and public spaces. 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. 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. 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. A Canadian manufacturer produces several larger full-range speaker systems, using 250 & 300 mm (10 & 12") drivers, to achieve higher output levels, and extended bass response.
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“A commercial society whose members are essentially ascetic and indifferent in social ritual has to be provided with blueprints and specifications for evoking the right tone for every occasion.”
—Marshall McLuhan (1911–1980)