Buy on Amazon : br AUNE T1 24bit96kHz TUBE DRIVEN USB DAC DECORDER HEADPHONE AMP !! 6922 UPGRADED TUBEbr br The Aune T1 is a visually stunning and well built 24-bit USB DAC and headphone amp capable of driving both demanding and low impedance headphones br High quality Tube USB Sound Card and amp br Adjustable Headphone Amp output Gain - choosing between 0dB 10dB and 16dB br Powerful and clear sounding that only tube warmth can provide br Its a beautifully built piece of kit and is so simple to operate just plug it in connect the USB cable to your computer and voila glorious music