Another impression: https://www.superbestaudiofriends.org/index.php?threads/review-fiio-k5.1605/ Don't worry, I'll get to the good stuff this weekend (the Amps and Sound Ovation). For now, we get this piece of entertainment. The K5Pro was of interest because a member mentioned that while it's not great in technicalities, the headstage is good. Good is that it's inside one's head, or that the plane isn't at one's ears. I can confirm this. The headstage is the best thing about the Fiio K5Pro. It's open and spacious. Actually almost as open as spacious as one of those EC DHT amps with the high-frequency AC filament heaters. Unfortunately, that's where the fun stops. The amplifier in the K5 isn't incompetent. However, it's a bit below average (in all other respects except headstage) considering what is out there today. The highs are bit glarey and sometimes a bit sharp. The lows are murky. I don't know what's in the K5, but the presentation is slightly insipid. Think of it as a Magnius sort of presentation, same murky bass, glarey highs, but leaner and less warm. Or think of it as a Topping L30, but brighter and more difficult in the highs, less overly forgiving. Wait, think of the K5Pro as being similar to those default headouts from the RME ADI Pro. Yup, that's it: meh. Something's gotta give if you want expansive headstage for cheap. I do think the K5 is bit less insipid than any of the aforementioned units. That's a good thing; but it's not by much. The K5 did seem to be less lean and glarey after being left on for an hour. All these impressions were arrived at via forced listening throughout one day before I took any measurements. It's best to listen and take notes before measuring stuff because... confirmation bias. Duh. BTW, I used a Modi Multibit (tweaked for less organic tone and better clarity) as the source. So no, the lean tonality and slightly difficult highs were not from my source. I now present the GONAD dashboard for the Fiio K5. This is amp only using the line outs. I am not using the internal DAC.