View 2 of 2.1 Channel Bluetooth 5.0 Audio Power Amplifier Board, JR-MT21 50 * 2+100W HiFi Subwoofer Audio AMP with Treble and Bass Control BT and AUX Inputs Module, DC12-24V Stereo AMP Module for DIY Speakers.

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View 1 of 2.1 Channel Bluetooth 5.0 Audio Power Amplifier Board, JR-MT21 50 * 2+100W HiFi Subwoofer Audio AMP with Treble and Bass Control BT and AUX Inputs Module, DC12-24V Stereo AMP Module for DIY Speakers.View 2 of 2.1 Channel Bluetooth 5.0 Audio Power Amplifier Board, JR-MT21 50 * 2+100W HiFi Subwoofer Audio AMP with Treble and Bass Control BT and AUX Inputs Module, DC12-24V Stereo AMP Module for DIY Speakers.