["Germanys Infineons new silicon carbide digital power amplifier chip is of higher quality and its efficiency is as high as 92% which further reduces energy consumption." USB audio input and supports driver-free use. With 2 sets of subwoofer signal pre-output it is convenient to connect the active subwoofer to form a 2.1 or 2.2 system. Bluetooth 5.0 reception better sound quality longer transmission distance A large number of audiophile audio components are used to enhance the subjective sense of hearing. Built-in low-noise high-power audio dedicated switching power supply to ensure a steady stream of music power. High-quality gold-plated input and output terminals. Complete protection circuits for overheating and overcurrent. With low power consumption standby function that meets the latest EU ErP2 standard]