Abstract: An audio enhancement apparatus includes a thermally insulating container and a substrate mounted at least partially within the thermally insulating container. A heat source is provided within the thermally insulating container and proximate to the substrate. At least one audio semiconductor is mounted to the substrate, where the audio semiconductor is located within the thermally insulating container. The thermally insulating container, in conjunction with the heat source, maintains an above-ambient temperature for the audio semiconductor while at least partially insulating components located outside of the thermally insulating container from the heat source. Another embodiment of the audio enhancement apparatus includes a thermally conductive substrate with at least one heat source located proximate to the substrate and at least one audio semiconductor mounted to the substrate. A heat dissipation device is also mounted proximate to the substrate.

Abstract: An AC/DC converter is provided for connecting to conductors of a multi-phased alternating current generator or network, which is built redundantly for protection against a total loss and which loads the AC generator essentially without non-linear distortion and where several power factor correction circuits, arranged in parallel with one another, are provided. A number of rectifier circuits are included which are independent of each other and equal to the number of phases of the generator. Each rectifier circuit has six rectifier elements which are connected in pairs to terminals of the generator and, by the formation of bridges, are commonly connected to the output conductors of the rectifier circuits. Each rectifier circuit is connected to a one phase power correction circuit. At least one switch is provided for each rectifier circuit.