One of the best headphone amps out there. This is the full version with pre-amp functionality.

Here are some reviews:

https://www.headfonia.com/sparkos-aries-review/

https://darko.audio/2020/10/moving-upfield-sparkos-labs-aries/

https://the-ear.net/review-hardware/sparkos-labs-aries-headphone-amplifier/

https://www.ecoustics.com/reviews/sparkos-labs-aries/

Will ship Express worldwide at asking price.