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Amazon.com: Sound Town 18" 500W Cast Aluminum Frame Woofer (Low Frequency Driver), Replacement Woofer for PA/DJ Subwoofer Cabinets (STLF-18120DR) : Musical Instruments
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DB Technologies Active 18” Subwoofer. 600 W RMS, Class D Amp, 35 - 130 Hz. MaxSPL 133 dB - dB Technologies
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