First of all, you'll get a lot more power — 20 blazing watts of continuous juice. By comparison, your factory stereo probably struggles to crank out 5-10 watts. More power doesn't just mean you can play louder, though, it elevates definition and accuracy at all frequencies, giving you greater realism in your music.
JVC also packs the KD-R330 with a superior CD deck that'll make your discs sound their best, a sophisticated equalizer for dialing in the perfect sound in your car, and two auxiliary inputs for plugging in your gear. Built-in frequency filters let you tailor the JVC's output so your speakers (and subs, if you got 'em) only play what they were designed to handle.