AM/FM Radio
WARNING: This page is about a different car, the 2013 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
The roof-mounted antenna receives both AM/FM radio waves and HD Radio® channels. The audio signals are sent from the roof-mounted antenna, via the AM/FM antenna cable to the ACM . The ACM converts the radio waves to a fluctuating AC output voltage. The ACM sends the right and left audio signals to the audio DSP module. The audio DSP module processes the audio signals and sends them to the speakers.