Geek Out IEM 100 USB DAC and Headphone Amplifier Specifically designed for use with sensitive in-ear monitors. The first and only 32-bit / 384kHz + DSD 128 portable USB Digital-to-Analog Converter. Features an audiophile grade Digital-to-Analog converter that connects directly to your headphones f Powerful pure Class A amplifier (100mW max power output) capable of driving power to the most sensit 3D "Awesomifier" for a wider, more lifelike listening experience.