Great sounding, easy-to-install midrange and highs make all the difference in your audio system. DS-Series Coaxial Speakers and 3-Way System provide the cost-effective ammo to keep up with your bass upgrade.DS Speakers are the best value for serious, drop-in upgrades in your doors. The woofers bear a polypropylene cone, UV-treated ribbed surround, enduring voice coil, and an interior-pleasing fresh look. The half-inch tweeters take the performance cues of higher-end coaxials, using a super-strong neodymium magnet and PEI (polyether imide) dome for louder, better-sounding highs.