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2) Alpine R2-W10D2 10" Type-R 750w Car Audio Subwoofers+Mono Amplifier+Amp Kit - Rockville Audio
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2 Alpine R2-W12D2 Car Subwoofer 2250W Max, 750W RMS 12" R-Series Dual – absoluteusa
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Alpine R2-W8D2 8” R-Series 350W RMS Subwoofer Dual 2 Ohm Car Audio Sub R2W8D2
Alpine RS-W12D4 R-Series shallow-mount 12" subwoofer with dual 4-ohm voice coils at Crutchfield
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Alpine R-Series R2-W12D2 12 Inch Dual 2-Ohm Voice Coils Subwoofer with 750W RMS
Amazon.com: Alpine ALP19-R-W12D4 Car Audio Type R Series Sub Dual 4 Ohm 1500W Peak 12" Subwoofer : Electronics
__98947.1667488344.jpg?c=2 "Alpine R-Series R2-W10D4 10 Inch Dual 4-Ohm Voice Coils Subwoofer with 750W RMS")