DAART Yulong DA1 Ultimate Personal Audio Center AK4499EQ DAC Headphone AmplifierFeatures: 4th generation proprietary high precision low tolerance FPGA solution YULONG JIC (Jitter and Interface Control), digital signals receive and convert,clock sync, FIFO buffering dual PLL AK4499EQ chipset DAC, Dual clock (SYNC ASYNC) mode, multiple filtering modes switch to combine different sounds. IPS wide angle LCD screen, 99 steps digitally controlld analog volume for Preamp and headphone output. SPDIF Optical AES supports DoP64, DoP128,