| 摘要 |
Some embodiments take the form of a vehicle audio amplifier comprising a plurality of amplifier stages and a controller. The amplifier stages are operatively coupled to each other and the amplifier stages include an input stage for receiving an audio signal and an output stage for driving at least one load in response to a supply voltage level. The controller is operatively coupled to the amplifier stages and configured to receive a volume signal that is indicative of a desired volume setting selected by a user. The controller is further configured to adjust the supply voltage level to the output stage to a first voltage level if the volume signal is less than a predetermined volume level. The controller is further configured to adjust the supply voltage level to the output stage to a second voltage level if the volume signal is greater than the predetermined volume level.
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