The thing that took my Lumin D1 from ok to Great was the Linear Tube Audio LPS. Unfortunately the D2 power supply is internal ....BUT!!! Your power supply can be upgraded by a kit sold by sBooster.
https://www.upscaleaudio.com/pages/search-results-page?q=lumin+sbooster
You need 2 items the connection kit and the LPS.
https://www.upscaleaudio.com/pages/search-results-page?q=lumin+sbooster
You need 2 items the connection kit and the LPS.

