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JBL LSR310S 10" Powered Studio Subwoofer (Each) | Guitar Center
Amazon.com: Presonus 10-Inch Active Subwoofer with Built-In Crossover Bundle with PreSonus Eris E8 XT Active Studio Monitors (2-Pack), Micro Station BT 2.1 Monitor Controller and TRS Cables (3-Pack) (7 Items) : Musical