During ChatGPT investigations i find out that my DAP [Hiby R8 II] can be described as 88% of one of the most quality audio board on PC: [RME ADI-2 DAC FS] . [Empire Ears Raven] scored around 90% of [Sennheiser Orpheus HE-1] top of the crop electrostatic hi-end earphones. Not a bad result for portable devices considering substantial difference in the price and size! I totally understand that it is a synthetic comparison, but at least now i have understanding approximate audio quality of my setup versus top-notch professional hardware.