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Monolith 13 Inches THX Ultra Certified 2000 Watt Powered Subwoofer Massive Output, Low Distortion, for Studio and Home Theater Systems : Electronics
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Monolith by Monoprice M-212 Dual 12in THX Certified Ultra 1000 Watt Powered Subwoofer - Monoprice.com
M&K Sound - For those who missed out on this great review! M&K Sound mean business: Like virtually no other loudspeaker set, the S300 Series raises the bar for demanding THX Ultra2-licensed
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