Got a pair of DT 1990s last week. Absolutely love them. Previously owned Bose AE2s, Astro A40s & HD660s. Also tested X2HRs, 712 Pros, Sundaras & DT 880s.
I tried both A & B pads. A pads were a bit thicker and just generally sounded better.
Then I moved on to trying Oratory's EQ but I thought...