Abstract: An audio signal conveying power supply configured to provide an output voltage to an electrically powered helmet, an additional audio headset or both. The housing having an audio and power signal inlet port to receive audio signals and power from a vehicle and an audio and power signal outlet port or transmitting audio signals and power to an electrically powered helmet using an independent audio cable connecting between the audio and power signal inlet port to the audio and power signal. A control circuit connected the at the power converted to operate an on/off switch, an active noise reduction switch, a low battery light, a fault light, and a helmet power switch.