Alpine S2-S50 - 340 Watts a Pair 2 Way 5.25" 13cm Coaxial Car Van Door SpeakersAlpine S2 S50 340 Watts a Pair 2 Way 5. 25" 13cm Coaxial Car Van Door Speakers Newly redesigned and Hi Res Audio Certified, the Next Generation S Series S2 S50 13cm (5) Coaxial Speakers offer a new standard in entry level sound performance. We packed supreme capability into these speakers by using highly effective materials and proprietary design elements. The lightweight woofer cone, crafted from a combination of polypropylene, glass fiber, and mica