This amplifier board uses TPA3116D2 imported from TI as the core, and the data single chip is 50Wx2. The reviewed the data and combined his own experience to develop a 50Wx2 dual- by bridging, which can theoretically reach 100Wx2.Since the chip is a digital chip, the efficiency is extremely high and can reach more than 90%, so it has the advantages of high and low heat generation. It is recommended to a DC 12-24V 100W switching supply for supply. This board is for . the supply And the speaker can check the new experience brought by pure digital music Product parameters:Chip : TPA3116Input : DC12-24VOutput : 2x100WInput impedance: 51Kx2Output matching: 4-8 ohmsFrequency Response Range: 14-100KzSex to noise : 100dbOutput channel: 2 (left channel + right channelsize:105x65x23mmMaterial:PCBcolour:orangePackage Contents:1 x amplifier boardOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.