Features: This power amplifier board using TI import TPA3116D2 as the core, the official data sheet for the 50W*2, engineers read the data and then combined with their own experience with the way to develop a bridge 50W*2 dual core technology, up to 100W*2 in in theory. Because of the chip for digital chip with high efficiency it can reach more than 90%, it has the advantages of high power and low heat. It is advanced power supply by more than 12-24V 100W DC switching power supply. The board for the finished plate hand is available, and when connected to the power supply and box, you can enjoy a new experienceto of pure digital music. Specification: Chip type: TPA3116 Input power: DC12-24V Output power: 2*100W Input resistance: 51K*2 Output matching: 4-8 Europe Frequency range: 14-100Kz. SNR: 100db Output channel: 2 (left and right) Size: approx. 120 x 65 x 22mm/4.72 x 2.55 x 0.86'' Weight: approx. 81g