Alpine S2-W12D2 Next-Generation 30cm (12 inch) S-Series Subwoofer with Dual 2-Ohm Voice Coils My Car and its innovative square cone

and its innovative square cone moves much more air than a conventional 12" round cone

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The S-Series speakers are designed to perfectly match the Alpine S-Series amplifier and subwoofer line for perfect system building

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Alpine S2-W12D2 Next-Generation 30cm (12 inch) S-Series Subwoofer with Dual 2-Ohm Voice Coils My Car and its innovative square coneNext Generation 30cm (12") S Series Subwoofer with Dual 2 Ohm Voice Coils Great bass for less For the best in bass, you need the best in materials and engineering. Alpine's redesigned Next Generation S Series subwoofers apply technology from their higher end subs to bring you the depth and punch that'll make your tunes come alive. With high tech materials and Alpine know how, these subs deliver the lows you crave at a budget friendly price. Redesigned