I don't really deal in quantifying these things other than to say it was noticeable. I'm not even sure I'd call it subtle. And I get the same out of my homebrew DDC. The only difference being the latter is USB --> i2S only, where Hermes is a much more flexible bit of kit, with all of the conversion to i2S or dual AES/EBU it can do. Truly impressive. It's most noticeable in the upper midbass/lower midrange areas as well as in instrument decay and rendering of space around instruments and within the stage itself.