CEntrance DACport HD Portable 384kHz USB DSD Hi-Res DAC/Class-A Headphone Amp Audiophile-grade AK4490 D/A converter plays HD music with bit-perfect accuracy. Amp designed for listening without fatigue, offers clarity, soundstage and detail. Ergonomic, side-mounted rotary volume control for single-handed adjustment. Volume control with perfect tracking, so your L/R channels are always in balance. Plug 'n play operation with Mac and Linux. Driver available for Windows.