ITEM NAME:XH-M510 TDA7498 High Power Digital Amplifier Board 2x100W Car Amplifier JR.Output power:100W 2 Output resistance:4-8ohm Line type:D types Chip:TDA7498 Harmonic distortion:Po=1W/0.05% Frequency response range:18-100KHZ. 1 x XH-M510 TDA7498 Amplifier Board.