Hiby R2 + FD1 + BEANS — groundbreaking HiRes stack
: doesn't require charge, fits HiBy R2 perfectly, good sound from 2.5mm balanced output, good compatibility
: SE power output kind of low
Full review of Hiby R2 + FD1 + BEANS stack is located on HeadFi by this
LINK
Not publishing it here to avoid cloning