Monoprice 12 Inch 150 Watt Powered Subwoofer, Black (109723) : Amazon.ca: Electronics
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Monoprice 12in 150-Watt Powered Subwoofer, Black 844660097235 | eBay
Monolith 12 Inch Powered Subwoofer - Black | THX Select Certified, 500 Watt Amplifier, 12 Inch Driver for Studio & Home Theater : Amazon.ca: Electronics
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Monoprice 12 Inch 150 Watt Powered Subwoofer, Black (109723) : Amazon.ca: Electronics