DAC, Headphone AMP, earphone AMP. Jitter free. USD D/A converter, plug-and-play,convenient ... small,portable,PC HiFi DAC, portable D/A converter, Headphone AMP, earphone AMP. Hifi audio amplier, your best PC music partnerItem: DAC ... ) SNR--------------------------80 dB ( BW 30K ) Crosstalk--------------------80 dB ( BW 30K ) THD+N----------------------0.01% ( BW 30K ) Frequency response-----20HZ-20K +-1 ...