The DPA-AMIX accessory card is designed to work in conjunction with DPA Series amplifiers that include a rear panel accessor card slot. The unit features 4 inputs, two mic/line inputs and two auxiliary line inputs. The mic/line inputs are user selectable and include Phantom power, 120Hz Hi Pass filter and a variable limiter on both inputs. The two auxiliary inputs feature a mono active summing circuit that gives the ability to connect two stereo sources to the amplifier simultaneosly. All inputs have separate level controls and signal and clip LEDs.