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Amazon.com: HiFi 2.1 Channel Digital Amplifier Bluetooth 5.0 Receiver Mini Stereo Audio Amp : Electronics
Amazon.com: S220HS 2.1 Channel Bluetooth Power Amplifier Board, TDA7498E Chip 160Wร2+220W, 12V-38V Audio Power Amplifier Module, Support Custom Bluetooth Name and Set Bluetooth Password : Electronics
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Amazon.com: UCINNOVATE Bluetooth Stereo Audio Receiver Amplifier, Hi-Fi Class D Audio Amp with Subwoofer AUX Output , Bluetooth Power Amplifier 2.1 Channel Digital Amplifier for Home Speakers, 100W x 2 + 50W : Electronics