Patent ID: 7945067

Claim:
An audio system, comprising: an enclosure having a substantially waterproof seal; an amplifier within the enclosure, the amplifier having an electrical audio signal input and an audio signal output, the audio signal output being exposed to an exterior of the enclosure through a substantially waterproof port by an audio cable that has a first end electrically coupled to the amplifier within the enclosure passing through the substantially waterproof port such that a second end of the audio cable is present outside of the enclosure; an audio signal source providing an audio signal to the audio signal input of the amplifier; a power supply wherein the power supply is mounted within the enclosure; wherein the amplifier comprises a power input, wherein the power supply is an AC/DC power supply, wherein an AC input is exposed to an exterior of the enclosure through a substantially waterproof port, and wherein a DC output is interconnected to the power input of the amplifier; wherein the power supply is an ATX computer power supply; and the audio system further comprising a relay, wherein the audio source comprises an audio head unit having a constant voltage input and a switched voltage input, wherein the ATX computer power supply comprises a constant first voltage level output and a switched second voltage level output, wherein the constant first voltage level output and the switched second voltage level output are connected to switched inputs of the relay, wherein the second voltage level output is connected to a trigger of the relay such that when the second voltage level output is switched off, the relay supplies the first voltage output to the constant voltage input of the audio head unit and when the second voltage level output is switched on, the relay supplies the second voltage level output to the constant voltage input of the audio head unit.