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Amazon.com: Bluetooth Power Amplifier Board,5.1 Bluetooth Digital Power Amplifier Module High Low Pitch Adjustable Stereo Digital Amplifier Board Module DC12‑24V 5A : Industrial & Scientific
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-TB22P 2.1 Channel Bluetooth 5.1 Amplifier Board with DC Cable TPA3116D2 50Wx2+100W TWS Box Potentiometer Amplifier
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Amazon.com: Bluetooth Power Amplifier Board Stereo - HiFi 2.1 Channel 2X220W+350W Bluetooth 5.1 Audio Amplifier Board 12-38V Digital Power Amplifier Module Subwoofer Control with AUX/Bluetooth/USB Flash Drive : Electronics
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Mini Bluetooth Amplifier Board Stereo - 50W+50W Audio Amplifier Board Bluetooth 5.1 Amplifier Board Kit Amplifier Module - AliExpress