Fosi Audio TB21 Bluetooth Sound Power Amplifier Board 2.1 Channel Mini Wireless Digital Amp Module 50W X2 100W Subwoofer 211011 From Jiao10, $24.59

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TB10A 2 Ch Amplifier Receiver Hi-Fi Class D Integrated Amp – Fosi Audio

TB10A 2 Ch Amplifier Receiver Hi-Fi Class D Integrated Amp – Fosi Audio

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ZK1002 Bluetooth 5.0 Amp Board 2Ch Mini Wireless AUX Amp – Fosi Audio

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Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 50W ×2+100W, 12V-24V Audio Power Amplifier Module with Treble and Bass Control for DIY Bluetooth Audio and Store Home Theater : Electronics

Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 50W ×2+100W, 12V-24V Audio Power Amplifier Module with Treble and Bass Control for DIY Bluetooth Audio and Store Home Theater : Electronics

Fosi Bluetooth Amp Module - Mini Wireless Stereo Audio Board – Fosi Audio

Fosi Bluetooth Amp Module - Mini Wireless Stereo Audio Board – Fosi Audio

Fosi Audio ZK-TB21 Bluetooth 5.0 Stereo Audio Receiver Amplifier Board 2.1Channel Mini Wireless Digital AUX Amp Module Bass and Treble Control for Home Passive Speakers Subwoofer TPA3116D2 50Wx2+100W : Electronics

HiFi 2.1 Channel Bluetooth 5.0 Digital Power Amplifier Subwoofer Audio Board NEW

Fosi Audio BT10A Bluetooth 5.0 Stereo Audio Amplifier Receiver 2 Channel Class D Mini Hi-Fi Integrated Amp for Home Passive Speakers 50W x 2 TPA3116 : Electronics