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Dayton Audio SPA1000 1000W Subwoofer Plate AmplifierThe Dayton Audio SPA1000 subwoofer amplifier provides nearly a kilowatt of clean, reliable audio power-just what you need to get big sound out of large, low-efficiency subwoofer speaker systems.Features of Dayton Audio SPA1000 1000W Subwoofer Plate Amplifier High power Class-AB output stage for cl..