Description: The CDA-7878 includes XM radio reception. This means that the driver is never out of fresh music while on the road. To keep all these tunes in line with the high sound quality Alpine is known for, the receiver is equipped with a special Digital Harmonics Enhancer (DHE) that analyzes and enhances the harmonic content of the music. Also included is the company’s signature Bass Engine Pro which allows total control over the sound frequencies and how a subwoofer interacts with the rest of the speakers. In short, this is one great-sounding CD deck.