a digital - to - analog converter circuit includes a pair of output stages , each including a dac configured to convert a digital audio signal into an analog audio signal . a low - pass filter circuit includes an operational amplifier in signal communication with the dac . the operation amplifier generates a filtered analog signal based on the analog audio signal . an amplifier network generates an amplified audio signal based on the filtered analog signal . the operational amplifier includes a feedback circuit path including a first node connected to the output of the amplifier network and a second node connected to the input of the operational amplifier . the amplifier network is electrically nested in the feedback circuit path .