The Alpine RS-W12D4 12-inch R-Series Shallow Subwoofer with Dual 4-Ohm Voice Coils is a powerful addition to your car audio system. Designed with Alpine's Gen2 DD-Linear Magnetic Circuit technology, this subwoofer delivers clear and accurate bass, making your music experience even better.The R-Series Shallow Subwoofers feature an oversized 4-layer voice coil and a lightweight yet rigid aluminum dust cap, allowing for excellent power handling and sensitivity. Don’t let the size fool you – these subwoofers are compact, making them easy to install in tight spaces. Upgrade your car audio system with the Alpine RS-W12D4 12-inch R-Series Shallow Subwoofer.