Aune T1 24bit/96khz Tube Amplifier USB Decoder USB DAC 6922 Tube Black Color Casing 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. High quality Tube USB Sound Card. High quality Tube Headphone Amp. Modular functional design, modules at all levels with independent power supply of high quality chips, and effectively avoid signal crosstalk between intimate delay protection design, delay access headphone and shutdown quickly disconnect completely avoid the imbalance of the switch machine instantly circuit DC output impact to protect your expensive headphones and speakers. It's a beautifully built amp and is so simple to operate, just plug it in, connect the USB cable to your computer and, voila!, glorious music :)