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TPA3118 Bluetooth 2.1 Digital Power Amplifier Board 2x30W+60W Subwoofer Adjustable Crossover Point Virtual Surround - AliExpress
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Stereo Amplifier with Sub Woofer Output 2.1 With Bluetooth - Hi-Fi Tube Amps, Accessories, Horn Speakers, Accessories, Accessories - Specimen Audio
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