Knowing the amount of people that would rather just let someone tell them, I'll dig it up.
"Well in a bit of a surprise I was thinking based on the graph of the MA750 that my X3s are what they would like but Danny and ericp are both right the MA750s are not as neutral as the S2. The S2 has the wider stage over the MA750 but the MA750 seems to have the a touch more depth in the sounds. I think both are comparable in imagery. Both have a very satisfactory sound. The isolation of the MA750 brings the sound a bit more forward in the presentation over the S2..I am going to get used to the MA750 for a while and see how they turn out with some burn in..Both are on a very similar level so far as sound goes. I think guys wanting more isolation the MA750s are definitely a compelling product. The benefit of the S2 is their semi openness which gives the earphones their stage and overall sound is more neutral over the MA750 but so far the MA750 to my ears are a bit fuller forward sounding earphone. The highs do extend a bit more on the S2 but the highs on the MA750 are not bad at all and not nearly as rolled off as the graph might indicate. They sound great.
I can already tell the MA750 is not going to scale as much as the S2 to amping simply because of their closed nature. These will have less head room as far as using more power to drive them goes. But for guys wanting a strong comfy great sounding unit that is going to be very satisfactory on the go the MA750 is way more impressive over the Onkyo IE-HF300 out of the box..
The S2 pairs extremely well with my X3 and the MA750 actually sounds better with the DX50."
"So fellas (and ladies if there are any on here), I've spent most of the evening A/Bing and tip rolling the S2, 750i, and DN-1K. I've been listening to all three earphones on the iBasso DK50, which is phenomenal! Definitely a lighter and wider soundstage than the X3 that looks slicker and more high-end (touch screen). I haven't had any UI issues and it performs like a champ with a beautiful sound, but I still love the thick sound of the X3. Both complement each other (as Dsnuts stated - I can't remember if DannyBai has both). Now back to the earphones.
First, for the first time ever (and after much tip rolling), I discovered that two of the earphones perform best with their stock tips when using the DX50. Those phones are the 750i and the DN-1K. The DN-1K takes a very wide bore tip (wider than the UE900 and TF10, stopping just short of the M200 in width). the S2 continues to perform well with the UE900 tips for my ears.
Okay, so the S2 sucked big time when I put the DN-1K and 750i tips on it, I heard virtually no bass. But when I threw on the UE900, wow did it sing! The wide soundstage and depth and clarity we come to know with the S2. But when comparing it to the 750i (with stock large silicon tips), the RHA proved to be fuller sounding with deeper bass and a more refined sound. I've been using the UE900 tips on the 750i, but since I've gotten a good 20 hours burn-in them, the bass is a bit too much with the UE900 tips. While not having the same wide soundstage as the S2, the 750i sounds airier, fuller, and more detailed than the S2 with its stock tips. And now we come to the Dunu DN-1000.
The sound is quickly developing and telling the story of what it will sound compared to the other IEMs. Before I give my verdict, let me just state something that ClieOS mentioned on the DN-1K thread. He said he got word recently from DUNU that the the DN-1K has been re-tuned for a new international version that's being shipped out. ClieOS stated that he only understood that the newer version suppose to less brighter, and that I probably have the Chinese version if I order from ebay. The news almost pissed me off before hearing my DN-1K, because that sounded like to me that the Dunu would have the irritating high spike that kind of turned me off from the H-200 (although I loved its sound otherwise). So I did buy my earphone from a dealer in China on ebay, but I bought it from the authorized ebay dealer I was directed to from the Dunu website. So I really don't know if this is the original Chinese version or the retuned version (took about two and half weeks to get to me and the tracking number didn't move for a good week and a half, so I'm thinking I might have the newer version). Then again, except for some specs on the side and the words in the front, most of the box is in Chinese. So there's no telling which version I have.
So, now that I got all of that out of the way, I can definitely say the Dunu DK-1K (dynamic driver and dual BA) does not have that awful spike in the high mids/low highs like the H-200. How else is it different from the H-200? Well it has a much more fuller 3-D sound than the H-200; a better selection - and quality - of tips than the T-Peos; and those interesting sound rings I mentioned in a earlier post so that you can adjust the sound from bass heavy to a more neutral sound. I settled on the blue rings (shy of neutral with nice bass presence but now too over powering, yet you feel the bass is there). The bass doesn't obscure the mids. Another reason I'm thinking that I have newer version is because the highs don't sound too bright to me. I can't stand piercing bright highs, so would know if the highs were like that. The highs here are extended and are there, but just shy of of being too bright for me. Let me go back some. the H-200 has the DN-1k beat, of course, with the different cable options. I have no idea how the new all-silver cable developed by T-Peos affects the sound of the H-200, but I have to imagine it does. Most silver cables I've heard seem to thicken the sound. But buying that cable also pushes the H-200 from a $250 earphone to a $350 earphone (something to be mindful as the DN-1K is only $185).
Okay, so back to the comparison to the S2 and 750i. Yes, the DK-1K is the clear winner in sound! The sound is spacious in a fuller more forward way than the S2 or 750i (or H-200). It's improving quickly with burn-in. Now, I only wish I could hear the K3003 to see if they sound anything alike. I will probably go to a high-end audio store in the city and take an audition soon. The DK50 and DN-1K really complement each other. I'll probably compare all three with the X3 tomorrow.
Oh, one other thing, the DK50 makes the Cardas EM8513 a more mid-focused sounding IEM. A highly detailed spacious mid-focus IEM with the UE900 tips. It's nice to listen to it that way, but I think the more bassy sound that I get out of the earphone with the X3 (still highly detailed with either DAP). That's it for now. Happy listening."
Trying to find Danny's, if he did post a comparison.
Edited by vlenbo - 1/25/14 at 9:49am