Newly redesigned and Hi-Res Audio Certified, the Next-Generation S-Series S2-S40C 10cm (4”) Component 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 fibre, and mica materials, serves up the essential high output / low distortion sound required for High-Res Audio performance. Alpine S-Series speakers feature increased magnet sizes for more power handling and best mid-bass performance in their category. The woofer's High Amplitude Multi-Roll (HAMR) surround brings out the best in bass by allowing maximum cone movement. A 2cm (3/4") dome tweeter serves up all the high-frequency detail you've been missing with your factory speakers. All speakers in the S-Series line have a wide vehicle fitment range and include several adapters and spacers. Using in-line crossovers, these speakers can be installed quick and easy even at home. FEATURES General • Woofer Size: 10cm (4”) • 2cm (¾“) Component Tweeters with Swivel Housing • Hi-Res Audio Certified (up to 40kHz) • Poly Propylene, Glass Fiber, and Mica Cone Material • Lightweight Design with High Output and Low Distortion • High-Amplitude Multi-Roll (HAMR) Surround SPECIFICATIONS • Power Handling • Peak Power: 140 Watts • RMS Power: 45 Watts • Dimensions Woofer • Cutout Diameter (flush-mount): 93.6 mm • Mounting Depth: 43.0 mm • Mounting Height: 6.6 mm • Magnet: 75.0 mm • Dimensions Tweeter • Cutout Diameter (flush-mount): 51 mm • Mounting Depth: 17.6 mm • Mounting Height: 7.6 mm General • Frequency Range: 100 Hz - 40 kHz (Hi-Res Audio Certified) • Impedance: 4 Ohms • Sensitivity: 85 dB/W