The two power amplifier chips are not comparable, 3886 is used very well in the field of HiFi, and 7850 is used well in the field of car audio, I think you want to play HiFi to buy 3886, you want to play car audio to buy 7850, this depends on your own requirements, If the two power amplifier chips compare the sound quality, it should be 3886 will listen better, but also depends on the circuit design is good, 3886 is a two-channel power amplifier chip, and 7850 is a four-channel power amplifier chip, the power of the two power amplifier chips is almost large, but 7850 more than two channels, the voltage required is not high, and 3886 needs a higher voltage. It depends on which amplifier chip you want to choose.