Buick 3.5-Inch Dash SpeakersRetroSound Premium Stereo Speakers provide the absolute best audio quality possible in your classic car or truck. For high power handling with an ultra thin mounting depth, a Neodymium magnet structure is used with a dip cut design to prevent distortion. The Santoprene surrounds provide the most accurate audio reproduction possible, and the silk tweeters produce smooth and more natural sounding highs. 3. 5 inch stereo speakers (sold as a pair)