The UD-507 is equipped with our proprietary “TRDD 5” discrete DAC,designed with musicality as the top priority.Following in the footsteps of TEAC's acclaimed 701 series,the new “TRDD 5” discrete DAC offers a clear soundstage and accurate imaging,providing listeners with a truly immersive musical experience. Fully BalancedDual Monaural Headphone Amp The UD-507 is a headphone amplifier featuring the TEAC-HCLD2 high current line driver,which is characterized by its high current supply capability.Compared to the previous model, the maximum output power has been greatlyimproved by strengthening the power supply, resulting in a generous driving power of1,200mW + 1,200mW (balanced output at 100 ohm load),which is comparable to a dedicated headphone amplifier without DAC.The power amplifier gain can be switched between 3 positions (Low/Mid/High) to fine-tune the output to best match the sensitivity and impedance of the headphones.