I just unboxed my DX7, on paper it looks worse than the D30 for real. But in SQ its much better, it has a insanely wide sound stage and very good instrument separation. I'm going to test the M8 again and see. Okay so across about 5-6 songs I can't tell the difference between the DX7 and the M8. I plugged the D30 back in and it also sounds about the same, there are certain songs though that the vocals are a bit recessed. I'm not sure why this is and I wonder if it has to do with heat since I have things stacked on top of the D30. I have the DX7 unplugged at the moment. I will go back to it in a little while, but with a 100ohm output impedance it really doesn't play well with the Amps. On the A30 or the O2 you have to put the volume up a considerable amount in order to get a good sound. For the A30 I have to have the volume at 75%+ on the Quad drivers (on 0db gain). Testing the internal Amp vs the A30 and the O2, I think that it sounds slightly worse. But this is likely due to the crosstalk and/or the 10ohm forced output impedance, although I still don't think I Could pick it out in a blind test and I'm not sure if that is a good or bad thing. EDIT3 (Removal): The one downside here is that other than the inclusion of a remote + XLR connectivity I don't see the point in having a DX7 at all. The build quality is certainly top notch and the box is heavy as hell. At the $285 price it is definitely worth it as it matches the SMSL M8 + comes with an Amp and alot of fancy features. I would say that its more worth $300-325 and at $400+ it will be a hard sell for most. If they could get it down to the $250 price range then it would completely wipe out the M8/M8A market. Even at a price of $325 it would be highly competitive to have the additional features vs an O2 stack, the D30/A30 stack and the SMSL M8 + VA2 or some other Amp. EDIT2: Can someone else with a DX7 check this: I get a ton of scratchiness down low especially in the right channel. Tried my Amps, and the built in Amp. Literally nothing I do will make this sound ok. I tried the same output on my HTC 10 and my speakers (both different DAC's obviously) and I don't have the problem. EDIT3 (continued): After Listening to this for a day with the same playlist I listened to the D30 with yesterday, and the M8 with the day before.... I can say that it easy beats both of them. Now don't expect any wild "Night and day" differences, but the reality is that there are micro-details which this unit reveals which I never knew existed even with the M8. Playing a jazz playlist (my daily mix of jazz) there are a few live songs in this list and the above song. In these live songs I literally heard people coughing or sneezing in the background, even what sounded like a guy putting his glass down on a table. I actually had to rewind the track because it threw me out of concentration when I heard this. (This is the song) The above track has some underlying scratchiness, but its not a "bug" now after listening to the rest of the playlist these are micro-details which other DAC's did not reveal. This is both a good and a bad thing as a poor recording is exemplified by even things like slight noises in the EDIT2 track. Now I have listened to this with the internal Amp and the Topping A30 and JDS Labs O2. I have to say that all 3 sound very much the same, I even used a UE Buffer jack on my headphones when testing with the A30 and with the DX7 a few times just to see if there would be output changes. It doesn't do anything but to lower volume (it does this with increased resistance). I actually feel lucky for getting this for $285 because honestly the details are really great, and while on paper the specs really don't seem to be better than the D30 and don't match the M8 it is actually more revealing than either one. EDIT 4: Just for testing purposes I have been testing with my 1More Quad drivers & Panasonic RP-HD10's. I packed up the Beyerdynamics to send them back because they aren't to my taste and the 16Ohm versions of the DT770s really are nothing like real DT770s.