Best Buy: Alpine Type-S 10" Dual Voice Coil 2-Ohm Subwoofer Black SWS-10D2
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Alpine S-W10D4 Type S 10" Dual 4 OHM Subwoofer with GTR-601 Mono Subwoofer Amplifier 600 watts RMS x 1 at 2 ohms - Creative Audio
Alpine SWS-1043D Type-S 10" subwoofer with dual 4-ohm voice coils at Crutchfield
Alpine SWS-1023D Type-S 10" subwoofer with dual 2-ohm voice coils at Crutchfield
Alpine S-W12D4 Car Subwoofer1800W Max, 600W RMS 12" Type-S Series Dual 4 Ohm Car Subwoofer - Walmart.com
Alpine S-SB10V 10" Sub Enc. & Remote Control & S-A55V Amp w/ Component Speaker
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