Summary 12" subwoofer with selectable 2- or 4-ohm impedance Coated glass-fiber cone with rubber surround + Steel Basket Power handling: 500 watts RMS (1500 watts peak power) Frequency response: 25-175 Hz grilles not included Infinity 12” Subwoofer w/SSI (Selectable Smart Impedance), Black, (INFSUBKA123WDSSIAM) Description All-around excellence: With their rugged construction and sophisticated engineering, Infinity's Kappa subwoofers excel in a variety of applications, equally at home in ported or sealed enclosures. These dependable subs feature switchable impedance so they'll always fit into your system, and they'll handle plenty of power so they'll deliver powerful, accurate bass. Plus, Infinity protects these subs with an impressive 3-year warranty. Product Tags Subwoofer