RAAL-requisite PDA-1a Headphone Amplifier

The PDA-1a by RAAL-requisite is a direct beneficiary of technology developed and derived from the highly successful and greatly reviewed HSA-1b. By eliminating the high-current requirements of speakers and ribbon headphones the model HSA has been purpose-tuned, to new heights, for even the most difficult to drive Planar and Dynamic headphones.

As a result, the PDA-1a easily drives two headphones simultaneously and provides the second headphone output with 0dB, -5dB and -10dB range attenuation for better matching when using different headphone types or to lower volume, if desired, for the second listener. Single-Ended RCA and Balanced XLR Inputs, 4-Grounding positions and 3-Levels of Input-Sensitivity, for XLR Inputs, providing for maximum range of settings for the 24-step attenuator.