An amplifier is the best way to ensure great sound quality. For the most part, sound quality and power are directly related. The more power going to the speakers, the better they are going to sound. For your classic car, we recommend adding an external amplifier as it allows you to truly enjoy listening to your music while you are out enjoying your vehicle. Chances are you have invested significant time and money into restoring, purchasing, or paying someone to restore your classic car. Why not enjoy driving it even more while listening to your favorite songs with clean, crisp, and clear sound? Adding an amplifier will allow you to do just that. Most new cars come with optional, premium stereo systems and adding an amplifier and good aftermarket speakers will sound even better than that. We carry amplifiers from top brands in the industry including Kicker, Rockford Fosgate, JL Audio, JBL and more. If you really want to round out your stereos sound, add a subwoofer along with an amplifier to fill out the bottom end of your music.