1. Strong output power, easily drive high impedance headphone. 2. Application of high quality components, ensuring stable and reliable product quality - using TI OPA2134 _TPA6120. 3. Creative combo highly cost-effective desktop DAC & AMP. 4. Various interfaces make it very convenient to connect with other equipment. Input supports AUX IN, USB IN (PC DAC), output supports heaphone output, LINE OUT and PRE OUT. It can also be used with some extension devices, such as PC, Pre-decoder, after-amplifier, etc.