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Outdoor Speaker Depot: In-Wall Dual Drive Passive Subwoofer with Sealed Enclosure, 8" and 10" Woofers - SC800D
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Amazon.com: OSD Nero Dual 8" Powered Subwoofer, 300W Dynamic Active and Passive Woofers, DSP App Control, Gold Platted Inputs, Piano Black Finish DualX8DSP : Electronics
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