After a couple of months of inactivity,
i listened to dx90 again with the 2.4 fw and this is by far the best sound i heard from the dap.The soundstage is noticeably more expanded and 3d,the tonality is just right,still neutral but more engaging than before,the treble is fantastic with none of the glariness of earlier fws and now a very good match with the se846.I say that because i could not stand the synergy of dx90 and se846 with none of the fw before it sounded thin and unengaging not so anymore.The treble is more thick and natural but the soundstage and imaging,i had a wow moment and i'm coming from daps with noticeably bigger soundstage than dx90.
Big thumps up to ibasso team for making the best value mid dap out there and keep improving.Some bugs are still present though like sometimes when i exit and go back to the song it displays the initial play time when it is at 3/4 or ending in real time.Hopefully it will be a good match with mojo which i ordered and the supplied coax cable is compatible without the need of additional cables.Cheers