Fiio am2a amp module for x7 am2a is the official mod modified version based on a popular un official mod version of the am1 it utilises the combo ad8620 ad8397ardz as its operational amplification the voltage supply of am2a is the same as that of the am2a the am2a offers a balanced smooth sound signature it is textured in the high mid frequency clear and analytical in resolution and rich in low frequencies overall the am2a offers a well controlled sound using the screwdriver included i