My DX100 arrived yesterday, a week and a day after I placed the order. For years I've been listening to a Cowon J3 with PL50 IEMs. Recently I bought a pair of FitEar F111s which I thought paired very nicely with the J3. Wonderful sound, or so I thought until I plugged the F111s into the DX100.
I listen almost exclusively to classical music and the improvement with the DX100 over the J3 was quite noticeble. The most obvious was the bass extension and control. This shows up in tracks that don't have deep bass ( i.e. Schubert's String Quintet) as stronger character, mainly in the lower registers.
But I was really shocked when I put on some CSN. The difference was dramatic, so much more well defined bass, greater attack in the guitar playing, and a pleasent filling out of the voices. It sounded like a different recording. There was so much going on that I had never heard before I was amazed. Not just little stuff like hearing them softly talk to each other but dramatic differences in the playing.
Needless to say I've very pleased. The DX100/F111 combo provides the same kind of engaging, enlivening listening I used to enjoy with my Stax CD94/CDA94 combo. The downside is that now I have more recordings that are less enjoyable to listen to due to the poor quality of the recordings. It's not surprising on the more compressed MP3s, but a flac of a nice performance of Beethoven's 4th Piano concerto sounded fairly lifeless compared to well-recorded pieces.
OTOH, I can't wait to hear what a good hi-res recording sounds like.
I did run into one very annoying glitch. There's a loud, sharp pop a few seconds after the DX100 is turned on. It's shocking to the ear, I have to remember to no put the IEMs in until after turning it on. Is this a common occurence and can anything be done about it?