TOPPING A70 PRO Headphone Amplifier / Preamp Balanced Volume R2R Black - reviews - There is 1 review.

Got A70Pro as a preamp and it works like a charm. Easy to set up and use even though the manual could be better. Possibility to save two user profiles and safe volume limiter are handy features.

The unit is heavier than I expected for its size, and feels very solid and well built. When changing the volume relays click a bit louder than I anticipated but that doesn't bother me. Screen is bright and easy to see at least from 3 meters away. And the most important part - sound quality - is top notch.

All in all an excellent hp-amp/preamp.