MMXpress.com offers plenty of stereo items for your car and even maintains an audio review section, where articles on anything from subwoofer buying tips to car insurance are discussed.
Speakers: To deliver true theater-quality sound, several speakers are essential, including front, center, and surround speakers as well as a subwoofer.
Dolby Digital equipped speakers use a 5.1 channel arrangement which adds a low-frequency subwoofer for intense bass resonance.
Car audio companies: The same companies that you'd consider for a car subwoofer also produce decent quality speakers.
Subwoofer: This style of speaker expands the deep tone in your music.