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Alpine W12S4 12" 250 Watt 4 OHM Subwoofers with GTR-601 Mono Subwoofer Amplifier 600 watts RMS x 1 at 2 ohms - Creative Audio
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Alpine Two W12S4 12" 250 Watt 4 OHM Subwoofers with GTX500 Mono Subwoofer Amplifier 500 watts RMS x 1 at 2 ohms - Creative Audio
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