The Alpine S2-W12D4 is a next-generation 12" subwoofer engineered for powerful and reliable bass performance. Featuring a lightweight yet durable carbon fiber and polypropylene cone, it delivers deep, low-distortion bass. The High-Amplitude Multi-Roll (HAMR) surround allows for maximum excursion, enhancing the depth and richness of your music. Its dual 4-ohm voice coils with configuration jumpers provide flexible wiring options, making it an excellent choice for various system setups. Subwoofer Type 12" Dual 4-Ohm Voice Coil Cone Material Carbon Fiber / Polypropylene Surround High-Amplitude Multi-Roll (HAMR) Magnet 64 oz. Strontium Ferrite Grille Compatibility Twist-Lock Grille Mount System (Grille Sold Separately) Power Handling (RMS) 600W Power Handling (Peak) 1800W Frequency Response 23Hz – 215Hz Sensitivity 86.2dB Impedance Dual 4 Ohms Voice Coil Diameter 2.6" X-Max (1-Way) 15mm Mounting Depth 5.05" Cutout Diameter 10.64" Recommended Sealed Box Volume 0.61 – 1.2 cu. ft. Recommended Ported Box Volume 1.06 – 1.6 cu. ft. Warranty 1 Year What's in the Box 1 × 12" Dual 4-Ohm Subwoofer 1 × Trim Ring (Installed) 2 × 3" Jumper Cables 1 × Mounting Hardware 1 × Owner’s Manual