Finally I have got A90 discrete set up and did an extensive listening session using D90SE (set to 00 Db output, BT=off, output V =5, filter= brick wall, connected to A90D via Mogami Studio Gold XLR 3’ cables. HPs are HIFIMAN Arya via 4.4 mm A90D output, gain is M). I used stock power and USB cables and no power conditioning, listening on a dedicated power line.
Tracks were Fruhlingsgefuhle by Melokind, Magnetar by Mark Lettieri, Beldiya by Triplego, Twice by Ludovici Einaudi (Reimagined by Merc...