Fiio am1 iem amp module for x7 fiios am1 amp module is perfect for use with your favourite iems its main advantages of low heat generation low power consumption and long battery life are specially designed for use with earbud and some portable headphones that dont require very high output power to drive them the am1 utilizes opa1612 as its voltage amplification which is a best selling audio operational amplifier from ti with low noise and power consumption the current amplifier ad8397 is a cl