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ZK-HT21 Bluetooth Amplifier Board 160W×2+220W Subwoofer 2.1 Channel Audio Amp

ZK-MT21 Bluetooth Amplifier Board,50W+50W+100W 2.1 Channel Subwoofer Amp Board

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2.1 Bluetooth DSP 3CH Independent 31-band EQ 2x30W + 60W Power Amplifier Board

4 x 100W Bluetooth 5.0 Multipoint + DSP Audio Amplifier Board - TSA8804

2.1 Bluetooth DSP Power Amplifier Board 50x2+100W 31-Segment Independent EQ