The Q112 is usually supplied as a component in 5.1 on other multi - channel systems.

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Typical installations include SARM London, where three Q112d's are used as Centre, Surround Left and Surround Right to complement the main Left/Right Q212d system. The Surrounds are mounted into the rear ceiling, hence the custom nature of this product as no two studios are the same. The volume of the cabinet can range from 50 to 110 Litres depending on the application.
There is no standard shape as the cabinets are individually designed to suit the space available and the low frequency extension required.