The HPA2™ is Benchmark’s state-of-the-art headphone power amplifier. It delivers high-current and high-output into two sets of headphones while maintaining less than 0.0003% THD+N to achieve breathtaking musical accuracy. The 0.1-Ohm output impedance delivers the damping factor required to accurately control headphone transducers. All of our headphone power amplifiers feature digital inputs. Analog inputs are included on the DAC1 PRE and DAC1 HDR. All DAC1 converters feature a large power supply to meet the demanding requirements of the HPA2™. The DAC1 converter family was originally envisioned as a headphone power amplifier with digital inputs.