Alpine S2-S40 Speakers 4 Inch 10cm S2 Series Car 2 Way Coaxial 45w RMS PairAlpine S Series: The Music Lovers Starter Pack S Series 10cm (4) Coaxial 2 Way Speakers S2 S40 Newly redesigned and Hi Res Audio Certified, the Next Generation S Series S2 S40 10cm (4) 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