dual amps can drive almost any headphones. 32bit 768k / 512 dsd all you need with excellent dynamics usb / coaxial, aes, optical inputs variable line out, so the Aune S6 Pro is suitable as a preamplifier !! AKM 4497 chipset 2 channel on amps. usb supports 32 / 768K DSD512 coaxial suppert 32...