The Rockford Fosgate R1S4-12 is a high-quality 12-inch single voice coil subwoofer with a 4 Ohm impedance. It has an RMS wattage of 150 and an RMS power of 200W, providing powerful and clear bass for your car audio system. This non-enclosed subwoofer is perfect for enhancing the sound quality in your vehicle without the need for an enclosure.

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