Amazon.com: Bluetooth Amplifier Board 2.1 2X50W+100W 12V-24V Audio Power Amplifier Module Bass and Treble Control for Store Home Theater Speakers with Antenna : Electronics
2.1 Hi-Fi Class D Audio Amplifier Board 2 x 15W + 30W 10-18 VDC
Amazon.com: Digital 2.1 Channel Amplifier Board Bluetooth USB Input 50w x2 Subwoofer BTL 100w Home Stereo Amplifiers for Speakers DC 12V-26V : Electronics
Amplifier Board | Subwoofer Amplifier | Power Amplifier | Bluetooth Amplifier - AIYIMA TPA3116
DX-2.1 Channel High Power Amplifier Board AC18~24V 100W+100W+120W
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300W 3-Channel Subwoofer Power Amplifier Board 2.1 High Power Amplifier Board 6259264363312 | eBay
2.1 Hi-Fi Class D Audio Amplifier Board 2 x 15W + 30W 10-18 VDC