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HIFI MOSFET HIFI TDA7850 4-channels Home Amplifier Board 4X50W Car Audio Amplifier Board DIY Kit

HIFI TDA7388 4 Channels Home Amplifier Board DIY Kit 4X41W Support Stereo Surround Sound Car Audio Amplifier Board

TDA7377 4 Channel Power Amplifier Kit Supports Stereo Surround Input

HOOD 1969 NPN 2.0 Channel Class A Amplifier Board and Heatsinks DIY Kit

3pcs 4S Series 3.2V Protection Board 30A 12.8V Discharge with Balance Lithium Iron Phosphate Battery Protection Board 10MOS