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Monolith Powered Subwoofer - 12 Inch with 500 Watt Amplifier, THX Certified, Ideal for Professional Studio and Home Theater : Electronics - Amazon.com
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Monolith M-12 V2 12in THX Certified Ultra 500 Watt Powered Subwoofer - Piano Black Finish | Massive Output, Low Distortion, for Studio and Home Theater Systems : Electronics - Amazon.com
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