Suono Town 45,7 cm 500 W cast aluminum Frame woofer (Low Frequency driver), ricambio per woofer PA/DJ subwoofer armadi (stlf-18120 a) : Amazon.it: Strumenti Musicali
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Source Factory Supply 7 Inch 60W 4 Ohm Fiberglass Subwoofer Speaker Woofer Speakers on m.alibaba.com