Well, mine is already modded, that’s what they did to my Calyx M (maybe it’s exactly what they wrote to you, but their English is not the best, so I guess it’s the same). Anyways, here is what they told me:
„Your Calyx M is no change any parts ,we just add on some components and circuit inside. We mod the dac chip and line output using the current boose circuit to upgrade the soundstage ,detail , airly and dynamic. Add some caps to make the power supply to strong . And place the copper shielding paper on the pcb to kill blackgound noise .“
Soooo, my modded DAP is on the way