Hey, I have those headphones, and I do notice some distortion in a few of my songs, but its never high volume so I always assumed its my files, but then again I don't have the same problem when I use the Klipsch Image s4s, quite weird, I guess that means the 750DJs are less forgiving of bad files. Anyways, to the point, I ordered the Fiio E7, I always had the feeling that the 750DJ are underpowered through the laptop and also alot of people, Shure included, say it should be amped or whatever (or so from what I've read). My main complaint is the feeling of it being underpowered but also I want a bit more bass, specifically more boom cause I think it punches fine but I don't get enough boom (this is imo), so hopefully the E7 will fix this. It should be here by next Thursday at the latest (I've been told this at every part of the process and it's always late so ill be lucky to have it by then) so just wait it out and I'll definitely come back to this thread and post impressions. My 750s have about 42 hours on them, I would have well over 50 by now which was my goal before using the E7 but I got my ear pierced and I don't want to have the headphones put pressure on it which obv the 750 would do. Hopefully though by next week I can use it again and get 50 hours in before the E7 so that way any difference will be attributed to mostly the E7 in terms of S and not alot to burn-in as it really hasn't changed much after like 10-20 hours (again imo) but it definitely changed alot within the first 10 hours, that plus my ears got accustomed to the sound. So I should be able to answer this by next weekend for you so just be patient, may save you $85-100 or I may also end up telling you to definitely get it, hopefully its the latter
Anybody out there currently using this with a dac/amp or just an amp, not alot of feedback on this and it would be nice to hear some impressions, thanks.