The iBasso AMP2 Four Channel Architecture with Current Feedback Buffer Amplifier Card is a headphone amp designed to be used with iBasso's DX200 DAP, offering a wider soundstage and added power to the outputs. Left, Right, Input ground, output ground comprises the four channels architecture. The design of the AMP2 eliminates ground current interference, which improves the sound purity. Nichicon FW audio aluminum electrolytic capacitors are used as the power filter capacitors. The use of five high speed operation amplifiers provide substantial output power. Current feedback buffers are used that provide a high bandwidth, exceptional slew rate, impactful dynamics and excellent transparancy.