30 dB? Which graphs are you looking at? These ones? https://audiosciencereview.com/foru...t-bifrost-multibit-dac.2319/page-5#post-63657 Because they both show, for example, 5 to 6 dB slope from -70dBFS to -80dBFS. Remember to read the righthand scale on Amir's graph. He re-scaled to match the scale on AtomicBob's graph.