Patent ID: 8561756

Claim:
An apparatus for reproducing acoustic signals, the apparatus comprising: an enclosure; a free convection passage located within the enclosure, the free convection passage comprising: a non-horizontal convection inlet acoustic port having an inlet opening coupled to the ambient environment and an outlet opening coupled to an internal volume of the enclosure; and a non-horizontal convection outlet acoustic port having an outlet opening coupled to the ambient environment and an inlet opening coupled to the internal volume of the enclosure, wherein the non-horizontal convection outlet acoustic port is positioned with its outlet opening to the ambient environment above the inlet opening to the ambient environment of the non-horizontal convection inlet acoustic port; and at least one heat producing element coupled to the free convection passage via a low thermal resistance conduction path, wherein heat produced by the heat producing element initiates a unidirectional free convective airflow in a direction corresponding to a path between the non-horizontal convection inlet acoustic port and the non-horizontal convection outlet acoustic port.