AES is a digital port, and speakers with AES input interface usually have a direct AES output. Audio from USB is converted into serial data through interface (USB bridge), and then connected to a speaker through direct output, so that several speakers can be connected in series. AES input is isolated by transformer, which has little to do with interface power supply and has almost no noise. If you don't pay attention to it, you can use the audio balance line as the connecting line.