SMSL Audio Sap-8 Black Audio DAC SMSL sAp-8 CNC Class-A HiFi Home Stereo Headphone Amplifier Power:(at 1% THD+N) 32 710mW 64 660mW 150 320mW 300 160mW Distortion: 300 0.001%at10mW Separation Rate: &gt; 110dB Size: 139mm X 122mm X 35mm Weight: 0.8kg The whole set with balance XLR and RCA input whole increase the equipment play High precision low drift resistance High performance ultra low ripple design of special switch audio power supply TOCOS potentiometer are outstanding audio material durable and easy to use