The Fostex HP-A3 is end of life, we can not supply this anymore. We offer an comparable alternative called the Mini-Q: https://shop.tripleaudio.nl/en/mini-q-set-incl-dt-770-pro-limiter

The Fostex HP-A3 is the perfect DAC for Computer Audio. This high quality unit features 32bit D/A Conversion with an integrated headphone amplifier exclusively designed to get the most from and PC audio set-up.