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Sound Town METIS Series 2400 Watts 18" Powered Subwoofer with Class-D Amplifier, 4-inch Voice Coil, High-Pass Filter (METIS-18PWG) : Musical Instruments
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Amazon.com: Sound Town STP Series Power Amp Plates for PA Speakers and Subwoofer (700W RMS,Class D, w/High-Pass Filter Outputs) : Musical Instruments
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