This is going to mostly be background on why I even bothered getting the d90se, a story if you will, that maybe will resonate with others. If you just want to know what I think of the dac, skip to the end, but the tldr is that it sucks. I've kind of been in what I would call the "audiophile" end of the pool as far as my equipment goes for quite a few years at this point. I never bought things based on measurements. I bought them with an eye on the measurements, but based on what I had heard at meets and at home, with the impressions of members I trust, and also what I thought of the engineering of the product in question. This has led to some excellent purchases on my part. The loaner programs here and at Changstar back in the day have also been invaluable, thats what led me to discover my love for the Gungnir DS. Trying all this gear, and reading impressions here is what allows you to find other members with similar tastes as yours, and even if they have different tastes in gear, you can learn to triangulate what you might think of the gear in question and whether it is worth persuing for your rig. This is where we get to why I bought the D90SE. I've always considered myself to be very engineering focused, shit, I got a degree in electrical engineer. I often times don't just read SBAF or head-fi, I do somewhat frequent ASR to lurk. I think reading a broad spectrum of sources gives you the best chance of finding your own biases and coming to the correct conclusions. I also constantly question my own decisions, thought processes, and actions, sometimes drastically. So a few weeks back, I was about to make some rather large purchases, a new AVC passive pre and a new DAC. And it was in that moment that I realized I'd never heard any measurement-fi gear. Not at all. And this is when a small nagging part of my brain was like, "Hey idiot, maybe, if the measurements say this shit all sounds the same, maybe it really does and you've just been fooling yourself this entire time, wasting all your money." Now, normally I wouldn't have humored this thought, but going into a rather large purchase, I was in the mood to experiment for a week or two first instead. If anything, I could write about it here and confirm something in the process. So what I did was buy a Topping D90SE and a Benchmark AHB2 (this isnt a review of the AHB2, but I will say, I do like the amp so far, it's not an immediate dismissal like the d90se was). These are both the best or one of the best measuring devices in their field. I also want to say that I went into this with an open mind, when I question my own behavior, I'm not half assing it. If anything, I wanted to like the Topping DAC, because its small, much cheaper than what I was looking at, and has a "nice" built in volume control. It would simplify my setup a great deal. ~~~~~~~ACTUAL(brief) IMPRESIONS START HERE~~~~~~ My rig currently consists of a pi4/pi2aes feeding a Schiit Gungnir DS feeding a Coincident Turbo 845 SE powering my Acoustic Zen Adagio speakers. The shittiness of the D90SE was obvious immediately upon plugging it in. I had read that it had some trouble with certain digital sources, sometimes having dropouts on optical from poor sources, to include TVs for instance. This isn't just true, it's very true. I get dropouts on the optical input from my TV once or twice every minute. The dropouts are brief, but I have never in my life had a DAC do this, from any source. To include shitty motherboard optical outputs. So already the Topping was in the hole. One thing in its favor though was the volume control. I am currently using a Coincident Turbo 845 SE integrated which has a stepped attenuator with some rather large steps in some spots I run into all the time. So I found having perfect 0.5db steps super handy. The next ding against the D90SE was with other digital inputs also dropping out. Using I2S from th pi2aes, which is a known low jitter source, I was getting dropouts like once an hour or so, same with RCA SPDIF. At this point I knew the D90SE was going back, but let me briefly give some auditory impressions of this DAC. To say that the D90SE can't soundstage, is a diservice to other DACs with poor staging abilities. It isn't just that it stages flat, cause it most definitely does, papersheet flat in fact. But within that 2d plane of "soundstage" there is almost no ability to discern instruments from each other, this is a very messy and congested sounding stage. Instruments and performers have no space or size to them, they are all flattened into the sheet that is the canvas this device draws. The Gungnir DS is no titan of staging/separation/holography, as many of you well know, I like it for other reasons. But when comparing it back to back with the D90SE, it was like going from a shitty mono speaker to surround sound, the stage exploded, giving space and separation to all of the players. The other thing the D90SE lacks completely is emotional involvement. The micro-stuff is just gone, there is no texture to vocals or instruments, the haunting realness of certain female vocals was gone completely, no goosebumps. It also has no drive/intensity/slam at all, and many of you know that is one of the main reasons I love the Gungnir DS. I went into this wanting to, almost expecting to, like and keep the Topping D90SE, but left even more dissapointed than I could have imagined I would be. They couldnt even test/design it well enough to get the digital inputs of the device working? (Oh, I should add, using it via USB I never had a dropout) And that is on top of absurdly lackluster musical performance. At 900USD I consider this DAC a ripoff. My Gungnir DS, a DAC that is not lauded for much of anything by anyone, trounces it at pretty much everything, I guess it doesnt have volume control though. Sorry @purr1n you asked for a mini review, I guess I did give you one, it just lives at the end of a journey. Has anyone else had similar thoughts to question all of their "audiophile" purchases? I feel this is natural, its just my humoring it that was out of the ordinary. But what it did do, was once again confirm my belief that measurements are only telling part of the story in this audio journey we are all on. As the saying goes, if it sounds good and measures bad you're probably measuring the wrong things. I didn't listen to this with headphones either, I basically don't use headphones anymore, except my AirPods Max while I'm at work, so YMMV on headphones as far as how much the things I bitched about will stand out there. It has also already been put back in the mail to return it and get my money back, so unfortunately further impressions won't be coming.