ITEM NAME:TDA7850 Car Audio Amplifier Board Amp Module 4 Channels 12V 50Wx4 XH-M180 Description: Name: TDA7850 four-channel power amplifier board Model: XR-M180 Chip: TDA7850 Input voltage: DC 12V Power: 4*50W Channel: two / four channels (switchable) Output anti-group: 4-8ÃŽ © Size: 128*86*29MM Package Includes: 1x Car Power Amplifier Board SKU: FUZ0027391063021023.Chip: TDA7850. 1x Car Power Amplifier Board. Channel: two / four channels (switchable). People always bought together with. Power: 4 50W.