This bundle features an Alpine S-Series audio upgrade with the S2-S50 5.25" Coaxial Speaker Set, S2-S40 4" Coaxial Speaker Set, and S2-W8D4 8" S-Series Dual 4 Ohm Car Subwoofer. The Next-Generation S-Series speakers deliver Hi-Res Audio Certified sound quality, boasting up to 40kHz frequency response. Both speaker sets are expertly crafted with Poly Propylene, Glass Fiber, and Mica Cone materials for lightweight yet robust construction and accurate audio reproduction. Enjoy powerful bass notes with Alpine's HAMR Surround technology in both speaker sets. The S2-S50 offers integrated 3/4” tweeters, a peak power of 170W, and an RMS power of 55W, while the S2-S40 features a peak power of 140W and an RMS power of 45W. The S2-W8D4 subwoofer enhances your sound system with deep bass performance, handling 300W RMS and 900W peak power. Its carbon fiber and polypropylene cone ensure low-distortion bass output across a broad frequency range of 23Hz to 215Hz. The subwoofer's Dual Voice Coil design and twist-lock grille mounting system provide flexibility and easy installation. Pair the subwoofer with Alpine's S-Series amps for optimal performance. Elevate your car audio experience with this Alpine S-Series bundle for rich, immersive sound quality on the road.