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Parts Express on Twitter: "Quite possibly the smallest self-contained subwoofer system, Tang Band's T2-2181SA pairs a long throw 2" driver with a high excursion passive radiator in an ultra-compact enclosure allowing you
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TB Speaker D42-1 4" - 2 Way Passive Radiator Design- Bookshelf Speaker- DIY Kit- Pair : Electronics - Amazon.com
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