Topping D30PRO - Digital to analog converter with 4 x CSR43198 DAC chips (total 4 balanced DACs per channel). Digital inputs: USB2, SPDIF, TOSLIK. Analog outputs: XLR + RCA. Volume control. PCM 44k to 384k, DSD64-256. HiRes Audio. Harmonic distorsion (THD+N) 0.00009%.